1. [The Pragmatic Programmer](https://pragprog.com)
2. Martin Fowler's [Refactoring Book](https://martinfowler.com/books/refactoring.html)
3. Kent Beck's [Test Driven Development: By Example](https://www.amazon.com/Test-Driven-Development-Kent-Beck/dp/...)
4. [Thinking in Systems: A Primer](https://www.amazon.com/Thinking-Systems-Donella-H-Meadows/dp...)
5. [Zen Mind, Beginner's Mind: Informal Talks on Zen Meditation and Practice](https://www.amazon.com/Zen-Mind-Beginners-Informal-Meditatio...)
6. [Pragmatic Thinking and Learning: Refactor Your Wetware](https://www.amazon.com/Pragmatic-Thinking-Learning-Refactor....)
A well written combination biography + philosophy book on Zen.
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