The Decision Book
Mikael Krogerus , Roman Tschäppeler
There are books you read once. There are books you reference twice. Then there are books like The Decision Book — the kind you keep open while you’re making strategic decisions, drafting arguments, or just trying to stay rational in a world built on incentives to be anything but.
This isn’t a flashy book. It’s not trying to dazzle you. It’s trying to calibrate you. And that’s why it works.
Think of it as a mental toolkit you can keep in your bag, desk drawer, or even subconscious. Each of the 50 models is short, visual, and actionable. You’re not asked to memorize — you’re invited to test, tweak, and apply. In meetings. In conflicts. In career plans. Or while overthinking your breakfast cereal.
“A model is not reality. But it helps you see reality more clearly.”
This book doesn’t try to impress you with complexity. Instead, it earns your respect with clarity. A matrix here, a quadrant there — it’s the kind of thinking aid that turns foggy problems into structured conversations.
🧠 Some Favorite Models:
• Eisenhower Matrix: So simple, yet brutally effective. Helps me protect my calendar from being colonized by other people’s “urgent.”
• OODA Loop: Originally for fighter pilots. Now my go-to for competitive environments (startups, negotiations, family WhatsApp groups).
• Rubin’s Vase: A reminder that perspective isn’t optional — it’s everything.
I now find myself sketching diagrams mid-call or reaching for this book when I'm mentally jammed. It’s not that it has answers — it’s that it helps me ask better questions.
Who Should Read This:
• People who solve problems for a living.
• People who create problems for a living and want to fix that.
• Anyone who wants to stop defaulting to intuition when strategy would be smarter.
The Decision Book is proof that intelligence isn’t about knowing more — it’s about framing better. Frame the problem correctly, and most decisions make themselves.