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Secret Self Care Book 1

Shut Up, Brain

How to Stop Overthinking, Quiet the 3 AM Spiral and Finally Trust Yourself

Cover of Shut Up, Brain by Mariah Renner: a yellow cover with a black scribble over a brain, an audiobook about overthinking.

For the next time your brain hits replay at 3 AM: three small moves you can use in the dark, and no promise of a silent brain.

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Opens in Spotify. Start anywhere: chapter 3 is the one for bed.

Or start with the free quiz
  • 1 h 49 min
  • Every chapter under 15 min
  • Digitally narrated

Tuesday

3:12

  • Brain: remember what you said at dinner?
  • You: It'll keep until morning.
The yellow Shut Up, Brain cover by Mariah Renner, as it appears at the end of the TikTok videos.

As seen in the TikTok videos

Is this the audiobook from TikTok?

Yes. If a video ended on a yellow cover with a black scribble over a brain and the words Audiobook by Mariah Renner, this is that book. Several other books share the title, so look for the yellow one: Shut Up, Brain by Mariah Renner, Secret Self Care Book 1. It is an audiobook, which means there is nothing to order and nothing to wait for. You press play.

Listen on Spotify

The free Shut Up, Brain quiz

What would you do at 3:12 AM?

The quiz turns the book into short everyday moments: a dinner on replay at night, a lunch you can't pick, a text on its fourth draft. It won't diagnose you. You pick an answer, and it tells you why the book's answer fits.

Take the free quiz
  • 9 decks, one for each part of the book
  • 60 real questions from the chapters
  • 3 min about a deck
  • Free no email, no sign-up

Three questions from the quiz. Tap an answer.

  • From chapter 3, the 3 AM Spiral Breaker

    It's 3:12 AM and you're replaying dinner. What's your first move?

    Show the answer

    The book's answer: Phone face down, then a longer out-breath.

    Step one is turning the alarm down a notch. The phone goes screen down, somewhere firm, and your body gets to settle into the mattress.

  • From chapter 6, the good-enough rule

    11:52 on a Tuesday. Wrap or soup? How much effort does this decision deserve?

    Show the answer

    The book's answer: Seconds. It's reversible.

    Reversible choices get seconds. A couch might get an afternoon. A job change might get a few weeks and a proper plan.

  • From chapter 7, "Are They Mad at Me?"

    Version four of a text, and you're still swapping "Thanks!" for "Thanks." What's going on?

    Show the answer

    The book's answer: You're polishing the worry. Fix what's wrong and send.

    From the book: If you're on your fourth version and still swapping "Thanks!" for "Thanks.", you're not improving it. You're polishing the worry.

Take the full quiz

57 more questions in 9 decks. It runs in your browser, and nothing you answer leaves your device.

Inside the audiobook

Ten short chapters, each one a different place overthinking shows up: the ceiling at 3 AM, the morning after a party, the group chat, the text that says ok. If you are trying to work out how to stop overthinking everything at once, start with chapter 2, then pick the chapter that sounds most like your week.

  • 13 tracks
  • 1 h 49 min unabridged
  • Chapter 3 is for bed

The chapters

  1. Introduction: 3:12 AM

    The ceiling, the phone, and the sentence from dinner on its fortieth replay. Who Mariah is, and a sixty-second first move you can try right away.

    Runtime 8:42
  2. Chapter 1: Your Brain Isn't Broken, It's on Alarm

    Why an overthinking brain acts like a smoke detector that goes off over toast, and why that is not a flaw in you.

    Runtime 10:56
  3. Chapter 2: Body First, Then Brain: The Three Steps

    The whole method in one chapter: turn the alarm down a notch, name the loop, decide or drop. One version for lying down, one for walking.

    Kit tool Spiral Map (kit p5)

    Runtime 12:01
  4. Chapter 3: The 3 AM Spiral Breaker

    How to stop overthinking at night, lying down, in the dark. A short routine for bed, phone face down. Chapter three is for bed, not the car.

    Kit tool The 3 AM Card (kit p4)

    Runtime 8:15
  5. Chapter 4: The Worry Slot

    How to stop worrying all day without ignoring the real things: give your worries one appointment, at one table, and keep it.

    Kit tool Worry Slot Planner (kit p8)

    Runtime 12:39
  6. Chapter 5: The Replay

    For the morning after every party, dinner or meeting: three questions, one pass, and then you are done with it.

    Kit tool The Replay Check (kit p6)

    Runtime 11:41
  7. Chapter 6: Sam and the Seventeen Opinions

    Decision paralysis and the good-enough rule, and how Sam finally bought a couch after four months of polling everyone he knows.

    Kit tool The Decision Ladder (kit p9)

    Runtime 13:59
  8. Chapter 7: "Are They Mad at Me?"

    Seen 9:41. How to stop overthinking in a relationship: tell a moment from a pattern, ask once, and live with not knowing yet.

    Kit tool "Are they mad at me?" (kit p7)

    Runtime 13:34
  9. Chapter 8: When It's More Than Overthinking

    The signs that a doctor or a therapist is the right next step, and what to say at a first appointment.

    Kit tool Get help (kit p15)

    Runtime 6:54
  10. Conclusion: Finally Trusting Yourself

    What counts as progress, why starting again is the skill, and the whole book on one card.

    Kit tool 14-Night Tracker (kit p10)

    Runtime 8:40

The 3 AM Kit: the book's tools, on paper

The audiobook comes with The 3 AM Kit, a 16-page printable companion, so you are not trying to remember a routine at 3 AM. These are real pages from it.

Print what you need, skip what you don't. Two or three favorites is plenty.

How to stop overthinking, in three steps

Thinking harder hasn't worked, and the book says so once, plainly. So it starts somewhere else: the body first, then the thought.

  1. Step 1: Turn the alarm down a notch.

    Give your body something to do first. A longer out-breath, in for four and out for six. Palms pressed together. Five things you can see. You don't have to feel better before you move on. Trying is enough.

  2. Step 2: Name the loop.

    Short and a bit silly. Oh, it's the dinner replay again. The what-if tour. The mad-at-me story. A loop with a name is easier to spot the next time it starts.

  3. Step 3: Decide or drop.

    Is there a real next step? Pick one and when. If the thinking's only job is to make you feel certain, drop it. Dropping means you stop answering it. It can stay. You go back to what you were doing.

Same three steps, different places

At 3 AM
The Spiral Breaker, chapter 3
In the daytime
Your worry slot, chapter 4
After a party or a meeting
One pass of the replay check, chapter 5
Before a choice
The good-enough rule, chapter 6
After a text that sets you off
The three steps, and the mad-at-me story gets its name, chapter 7

"You can't argue a thought into lying down."

From the book

Who it is for

  • You run conversations back for days, or read a two-word reply eleven times looking for the tone.
  • You want something short you can finish this week, on a walk, on the bus or at the sink.
  • You like advice that is kind and a little blunt, from someone who has run the same loops.
  • You want a first move for the bad nights, not a lecture about why you have them.
  • Choosing lunch takes a group chat, and the group chat is tired too.

Who it is not for

  • You want your brain switched off for good. No book can do that, and this one won't pretend.
  • You want a diagnosis or a treatment plan. This is general self-help, not therapy or medical advice.
  • You are in crisis right now. Please call or text 988 in the US, call 911 in an emergency, or find a free line near you at findahelpline.com.

Shut Up, Brain is general self-help, not medical or psychological advice. Mariah Renner is not a therapist or a doctor. Chapter 8 explains when overthinking needs more than a book, and what to say at a first appointment.

Free for overthinkers. No sign-up.

Two free things live on Kalderno, and neither asks for your email.

The 3 AM extras

Three downloads that put the book's tools where you will actually reach for them at night. Can't quiet your mind enough to sleep? Nobody honest can promise you sleep. These give you something to do instead of arguing with the thought.

  • The 3 AM Reset: a six-minute audio for the nights the card isn't enough. Press play, phone face down.
  • Nights 15 to 30: the second half of the tracker, so the habit doesn't stop at night 14.
  • 12 lock-screen wallpapers with the three steps on them, light and dark, for iPhone and Android.
Get the free 3 AM extras

Free, no sign-up, no email. Just downloads.

The free overthinking quiz

Why do I overthink everything? The quiz won't diagnose you. It walks you through the book's tools in short everyday scenarios, one question at a time, and tells you why each answer fits.

Take the free quiz

It runs in your browser. Nothing you answer leaves your device.

Ratings live on Spotify

We don't copy ratings or reviews onto this page. When listeners rate Shut Up, Brain, those ratings live on the Spotify page, where you can check them yourself.

See it on Spotify

I'm not going to tell you this book is great. I wrote it, so I would say that. Play the chapter 7 sample and decide for yourself.

Mariah

About the author

Meet Mariah

Hi. I'm Mariah. For most of my life I was a champion overthinker: I could turn a two-word text into a three-act play before my coffee finished brewing. I still overthink. My evenings are mine again.

I work in operations at a property-management company, so my days are spreadsheets, leases, a lot of email and a Monday team check-in. I'm not a therapist or a doctor, just a fellow overthinker. I wrote down the small moves that worked when thinking harder didn't, in daylight and never in bed. Those notes became Shut Up, Brain.

Her sign-off: Starting again is the skill.

Mariah Renner is a pen name, and she keeps her face off the internet. Jess, Sam and the other friends in the book are composites, with names and details changed. Represented by Kalderno, a publishing programme of Quicktale Limited.

Shut Up, Brain is book 1 of Secret Self Care, a series of short audiobooks for the things we don't say out loud. Book 2 is on its way.

Take Mariah's free quiz

From Mariah's notes

  • A laptop on a kitchen table showing the Shut Up, Brain audiobook marked in review, next to an iced matcha, a mug of coffee, an earbuds case and a phone lying face down. One hand rests on the trackpad.

    The morning it went in for review. Coffee first, then iced matcha.

  • Post: what I said, "Sounds good!" What my overthinking heard: "She hates it. She hates me. She's telling Tom." Toast, not smoke. Run it once, then drop.

  • Post: Dear 3 AM you, the apology text you drafted twice is stranger than the sentence ever was. Don't send it. It'll keep until morning. Love, M. Written in daylight, for the next time it's 3:12.

  • Post: The Gerald Report. Tight jaw. Same app opened five times. Toast alert, not fire alert. First move: feet down. Not medical advice. Gerald was my grandma's smoke detector. He went off over toast. Your brain has one too.

  • Post: Draft 4. Draft 1, "My book is out!!", desperate. Draft 2, "My book is out.", furious. Draft 3, "My book is out! No pressure to listen!", too much. Draft 4, "My book is out!", sent. Launch week. Read once for mistakes, once for tone, then send.

  • Post: Radiator Report. Ticked all night. Woke up twice, replayed one sentence once. Better than Tuesday. I refuse to name it. Naming appliances is Grandma's thing.

Questions

Is this the Shut Up, Brain audiobook from TikTok?

Yes. Shut Up, Brain by Mariah Renner is the yellow audiobook shown in the TikTok videos. It is Secret Self Care Book 1, it runs 1 hour 49 minutes, and you can listen on Spotify. Several other books share the title, so look for the yellow cover and Mariah Renner's name.

How do I stop overthinking at night?

Start with your body, not the thought. Put your phone face down, press your feet into the mattress, let one long breath out and notice one sound. Then give the thought an appointment for tomorrow and set it down. That is the short version of the 3 AM Spiral Breaker in chapter 3. It won't switch your brain off, and nothing honest promises that, but it gives you something to do instead of arguing with the thought.

What is overthinking?

Overthinking is running the same thought again and again without getting any closer to an answer: replaying a conversation, rehearsing an argument that hasn't happened, or polling everyone before a small decision. It feels like problem solving, but it mostly produces more questions. Shut Up, Brain treats it as an alarm that goes off too easily, not as something wrong with you.

Why do I overthink everything?

The book's answer is that your alarm system treats everyday social risks like real danger, so your brain keeps checking for an answer that would make it feel safe. Mariah compares it to her grandmother's smoke detector, Gerald, which went off over toast. To practise spotting the loops, try the free quiz at kalderno.com/overthinking: short everyday scenarios, one question at a time. Nothing you answer leaves your device.

How do I stop overthinking in a relationship?

Chapter 7, "Are They Mad at Me?", is about exactly this. Run the three steps before you reply, name the story your brain is telling, and if you still need to know, ask once, at a sensible time, in plain words. Asking again would be for you, not for them. And if something keeps happening, that is a pattern, and it deserves a real conversation, not a better guess.

Where can I listen, and how long is it?

Shut Up, Brain is an audiobook on Spotify. It is unabridged, digitally narrated and runs 1 hour 49 minutes over 13 tracks, with every chapter under 15 minutes. How you can listen depends on your Spotify account, and the Spotify page shows your options. There is no paperback or Kindle edition.

Is Mariah Renner a therapist?

No. Mariah Renner is a pen name, and she is not a therapist or a doctor. For most of her life she was, in her words, a champion overthinker, and she wrote down what worked for her. The book is general self-help, not medical or psychological advice.

What if it is more than overthinking?

Then it deserves more than a book. Chapter 8 covers the signs that a doctor or a therapist is the right next step, and what to say at a first appointment. If you ever feel unsafe or worried you might hurt yourself, call or text 988 in the US, call 911 in an emergency, or find a free line near you at findahelpline.com.

3:12 AM. Phone face down. The thought gets an appointment.

Morning. It kept.

Cover of Shut Up, Brain by Mariah Renner: a yellow cover with a black scribble over a brain, an audiobook about overthinking.

Press play. Then phone face down.

Shut Up, Brain is an audiobook, so the first step takes one tap. Chapter three is for bed. The rest works on a walk, on the bus or at the sink.

Listen on Spotify

Audiobook on Spotify, 1 h 49 min, digitally narrated. The free extras need no sign-up.

"It'll keep until morning."

From the book