This book is a godsend for anyone who's ever been confused by semiotics (I am one of these people).
A lot of the graphic design books I've used before have mentioned semiotics in passing, but usually in a fairly laboured way. They tend to make cryptic and contradictory references to the importance of "signs" and "signifiers", almost as if the writer doesn't know what they are.
This book is the answer to all of this. It's a clear and interesting introduction to this topic. The writing itself is worthy of praise, but when combined with the fantastic illustrations, most of which come from Crow's own work, the two become more than the sum of their parts.
A great book, well designed, well researched, well written. For anyone in the slightest bit interested in this fascinating subject (and this should be all designers and design students) this book is the perfect guide.