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Stef Koolen

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Stef Koolen

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Stef’s favorite books

Thinking, Fast and Slow by Daniel Kahneman

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The Book of Joy: ...

Stef Koolen is currently reading

The Book of Joy: Lasting Happiness in a Changing World

by Dalai Lama XIV

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Sep 28, 2026 02:15AM

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Stef’s 2025 Year in Books

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Stef’s Friends (4)

Lucas

Lucas

47 books | 4 friends

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Joost Klabbers

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Jules Van

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Auke Os...

Auke Osinga

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Fiction, Non-fiction, and Young-adult

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