I only add books that I would recommend to others.
12 saved books
Timeless insights into how seemingly insignificant actions compound into wonderful (or catastrophic) results. One of the best books I've read.
Paul Graham talks about "hackable tests" in his essay The Lesson to Unlearn, and in this book Cal explains how to exploit this to a fair degree to make the best use of your time. The systematic approach presented in this book is something I wish I had during university.