First of all, full disclosure: I am a contributor to this book. That being said, all I did was to write up something I make and send it to the editor--I had nothing to do with any of the rest of this book.
This is a totally unique book in the world of crochet. It is written by crocheters for crocheters. Being self-published, it contains the sort of things crocheters wish mainstream publishers would put in their books, but are afraid to for fear it won't sell. It is worth supporting for that reason alone.
There is no "how to" section, something most publishers of crochet books seem to think is necessary, no matter how advanced the book is otherwise or how many other places that information is available, so the space normally wasted on that is devoted to interesting work.
The contributions, by the Crochet Liberation Front group formed on Ravelry, include patterns, recipes (general blueprints, rather than specific how-to's), essays and memoirs. The variety is amazing. So are some of the techniques and patterns. Don't miss the tapestry crocheted fingerless gloves--they're very innovative. There's something for everyone in this book; it's worth a look and worth supporting.