The field guide to brain performance
Twelve science-graded routines for focus, memory, sleep and habits
What do you want to work on today?
Turn the bezel
Turn the dial, pick what you want to work on, and get a first step you can try today. Every step in the book is graded A to D by the strength of the science behind it.
- A–D on every step
- 70 sources
- 2nd edition, rewritten in plain language
How it works
Find it, try it today, then run it for four weeks
- Find what you want to work on.The Start here page lists the everyday things people want to fix, like sleep, focus or overthinking. Each one points to a stack. Not sure? Score yourself on twelve areas, and the book tells you where to start.
- Try one small step today.Every stack opens with a step small enough to do today. On a bad day, it’s also your minimum.
- Run the full routine for four weeks.Do the full routine when you can, and the Try today step on the days you can’t. Tick it off each day, and check how much the problem got in the way at the end of each week.
Inside the book
The twelve stacks
Twelve short routines in four groups. Tap one to try its first step on the dial.
Base
Energy and sleep. Everyone starts here.
Work
Getting good work done.
Pressure
Staying useful when things are hard.
Change
Making it last.
The science
Every step is graded
Most steps in the book end with a letter that shows how strong the evidence is, as of 2026. A low letter doesn’t mean a step is wrong. It means the proof is thinner, so treat it as worth trying rather than certain.
The full edition carries the studies behind every grade, including the popular claims that didn’t hold up.
- ATested many times in people, or basic body-clock biology
- BGood human evidence, with some “it depends”
- CPlausible, but the human proof is thin or mixed
- DOne small study, an animal study, or a claim with no study behind it. The book keeps these out of the routines.
- 12stacks in four groups
- A–Devery claim graded
- 20recipes for life
BRAIN STACK · Second edition
Love? Get the book
Every word on the dial points to a stack in BRAIN STACK. The book holds all twelve, plus the tools to run them.
Sold on Amazon. Paperback in two sizes, or Kindle
For book owners
Own the book? Use it every day
BRAIN STACK comes with a free companion for your phone. It asks the book’s questions to find your stack, walks you through your four weeks, and keeps the log for you.
- Not sure where to start? Score yourself on the book’s twelve areas, or pick what you want to work on.
- Tick your day in the evening. It takes under a minute.
- Every seventh day, a two-minute review shows how much the problem got in the way.
- Put your stack on your lock screen, so it’s the first thing you see.
- Every stack in full, to read any time with nothing tracked.
Everything you write stays on your phone. The link and your code are on the last page of the book.
Already own it? Open the companion →TodayYour log
Stack 1 · Week 2 of 4
Set your body clock
This week: Run the full routine on most days.
Bad day? Spend five minutes outside within an hour of waking.
Day 9 of 28Review in 5 days
Today’s log
Every day
Your stack
Stack 1
Set your body clock
All twelve stacks
Stack 1
Try today
Tap Log today, or Read, to look around