Swedish knits : classic and modern designs in the Scandinavian tradition by Paula Hammerskog and Eva Wincent; photos by Rikard Westman
This book has the usual introduction to the basics of knitting, but also includes more detailed information on garment construction and a number of advanced techniques. It also has a great section on what to do when something goes wrong - your cable twists the wrong way, something turns out too large or too small, and other common problems. There is also quite a bit of info on interpreting patterns and on making your own. Finally, the sweater patterns are beautiful. This book is a treasure trove of information for knitters.