Comment Re:Have You Noticed Any Personal Income Loss? (Score 1) 987
SEO. Exactly. I self-published a book on Lulu, made it available all over by purchasing an ISBN, and put up a website with samples, some SEO, and a completely free PDF version (Creative Commons). Searching for my book or parts of my book title lead you to... my book, then a few other places also hosting copies of the PDF and linking back to my site. So the answer is, do a better job of branding the book online. Period.
For reference, it's a PHP Book: http://www.phpreferencebook.com/