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A growing library of the most powerful ideas from great books — each taught in minutes, then locked into memory with spaced repetition.

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Build better habits

Tiny, compounding changes beat heroic effort.

Think more clearly

Catch your mind’s shortcuts before they cost you.

Your mind runs on two systems: fast and slowThinking, Fast and Slow · Daniel Kahneman Judge decisions by their quality, not their outcomeThinking in Bets · Annie Duke We’re irrational — but in predictable waysPredictably Irrational · Dan Ariely Focus on your Circle of Influence, not your Circle of ConcernThe 7 Habits of Highly Effective People · Stephen Covey The map is not the territoryScience and Sanity · Alfred Korzybski Losses hurt about twice as much as gains feel goodThinking, Fast and Slow · Daniel Kahneman The first number you hear quietly drags every guess after itThinking, Fast and Slow · Daniel Kahneman You go looking for what you already believeOn the failure to eliminate hypotheses · Peter Wason When actions and beliefs clash, the belief usually bendsA Theory of Cognitive Dissonance · Leon Festinger The simplest explanation that fits is usually the right oneOccam’s Razor · William of Ockham Never assume malice when a simple mistake explains itHanlon’s Razor · Robert J. Hanlon First-principles thinking: reason from what’s true, not what’s assumedThe Great Mental Models · Shane Parrish Inversion: solve problems backward by asking how to failPoor Charlie’s Almanack · Charlie Munger Second-order thinking: always ask ‘and then what?’The Most Important Thing · Howard Marks Chesterton’s fence: understand why it’s there before you remove itThe Thing · G.K. Chesterton The framing effect: how something is worded changes your choiceThinking, Fast and Slow · Daniel Kahneman Negativity bias: bad is stronger than goodThe Power of Bad · Roy F. Baumeister & John Tierney The endowment effect: you overvalue what you already ownThinking, Fast and Slow · Daniel Kahneman The availability heuristic: you judge by what comes to mind easilyThinking, Fast and Slow · Daniel Kahneman The mere-exposure effect: familiarity quietly becomes likingThinking, Fast and Slow · Daniel Kahneman The IKEA effect: we overvalue what we build ourselvesPredictably Irrational · Dan Ariely The halo effect: one good trait colors everything elseThinking, Fast and Slow · Daniel Kahneman Regression to the mean: extreme results drift back toward averageThinking, Fast and Slow · Daniel Kahneman Base-rate neglect: the vivid story makes you forget the oddsThinking, Fast and Slow · Daniel Kahneman The contrast effect: things look different next to what came beforeInfluence · Robert Cialdini The fundamental attribution error: it’s the person, you assume — but it’s often the situationThe Person and the Situation · Lee Ross & Richard Nisbett Hindsight bias: ‘I knew it all along’ (you didn’t)Thinking, Fast and Slow · Daniel Kahneman The overconfidence effect: we’re far surer than we are rightThinking, Fast and Slow · Daniel Kahneman Moral licensing: doing good gives you permission to do badSin to Win (research on moral self-licensing) · Monin & Miller Reactance: tell people they can’t, and they’ll want toInfluence · Robert Cialdini Maslow’s hammer: if all you have is a hammer, everything looks like a nailThe Psychology of Science · Abraham Maslow The just-world hypothesis: the comforting lie that people get what they deserveThe Belief in a Just World · Melvin Lerner The Barnum effect: vague descriptions feel personally accurateresearch on personal validation (Forer) · Bertram Forer

Decide & build smart

Aim limited effort where it actually pays off.

Grow & master

How real skill and motivation are built.

Live more deliberately

Reclaim your attention, your response, your peace.

Understand the world

The hidden rules behind money, people, and society.

Wealth is what you don’t seeThe Psychology of Money · Morgan Housel Humans rule the world because of shared storiesSapiens · Yuval Noah Harari Some things gain from disorder — that’s antifragileAntifragile · Nassim Nicholas Taleb Rare, unpredictable events shape history mostThe Black Swan · Nassim Nicholas Taleb We feel obliged to give back — the rule of reciprocityInfluence · Robert Cialdini People don’t buy what you do — they buy why you do itStart With Why · Simon Sinek You’re only seeing the survivorsHow Not to Be Wrong · Jordan Ellenberg What everyone owns, no one protectsThe Tragedy of the Commons · Garrett Hardin People get promoted until they reach the job they can’t doThe Peter Principle · Laurence J. Peter The more people who could help, the less likely anyone doesThe Unresponsive Bystander · Darley & Latané Goodhart’s law: when a measure becomes a target, it stops measuringThe Tyranny of Metrics · Jerry Z. Muller The Lindy effect: the longer something has lasted, the longer it will lastAntifragile · Nassim Nicholas Taleb Social proof: we copy what others do, especially when unsureInfluence · Robert Cialdini Commitment & consistency: small yeses lock you into big onesInfluence · Robert Cialdini Comparative advantage: specialize in what you give up least to doOn the Principles of Political Economy and Taxation · David Ricardo The network effect: some things get better the more people use themInformation Rules · Carl Shapiro & Hal Varian Creative destruction: the new can’t arrive without burying the oldCapitalism, Socialism and Democracy · Joseph Schumpeter The cobra effect: when the fix makes the problem worseThe Cobra Effect · Horst Siebert The bandwagon effect: belief spreads because others believe itIrrational Exuberance · Robert Shiller Dunbar’s number: you can only really know about 150 peopleHow Many Friends Does One Person Need? · Robin Dunbar Brandolini’s law: refuting nonsense costs far more than making itthe Bullshit Asymmetry Principle · Alberto Brandolini

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