I had a huge library of lutherie books, and I sold all of them but the Big Red Books. The BRBs are wonderful for serendipitous browsing. Video tutelage has made books obsolete. Robbie O'Brien's online steelstring guitar course is excellent, and Robbie tells me that he has lined up a uke builder to teach a series. The uke course may be a year or more out, however. The accumulated time I spent reading lutherie material probably adds up to several months 24 hours a day, and most of that would have been better spent in the shop. The MyaMoe (?) videos are better viewing than real TV, they will teach you what you need to know, and they are free. Spend your money on tools and wood.