Apple II User's Guide

I read the Second Edition of the Apple II Users' Guide. This edition covers Applesoft BASIC programming and can be read easily by novices, yet is informative enough for experts. It is exhaustive; the reference guide in the back gives precise definitions of each Applesoft command. Indeed, this book is better than the official Apple documentation. One warning: this book was published before or nearly at the same time as when ProDOS came out, and covers only Apple DOS 3.3. (Some editions may cover ProDOS, but not the one that I read.)