Here are a bunch of free online books. I update this page with new books occasionally. computer science Software Engineering at Google by Titus Winters, Tom Manshreck, and Hyrum Wright A Data-Centric Introduction to Computing by Fisler, Krishnamurthi, Lerner, and Politz Programming Languages: Application and Interpretation by Shriram Krishnamurthi How to Design Programs by Felleisen, Findler, Flatt, Krishnamurthi The Nature of Code by Daniel Shiffman Everything curl by Daniel Stenberg et al....