https://leanpub.com/97-Things-Every-Programmer-Should-Know-Extended/
97 Things Every Programmer Should Know site had an amazing collection of essays about programming practices. Kevlin Henney has created a nice book "97 Things Every Programmer Should Know" of the selected 97 essays. This book is a collection of an additional 68 essays available at the site but doesn't appear in Kevlin's book.
All royalties from this book go to Electronic Frontier Foundation (EFF).