This comment [1] summed the one book I read quite well:
This book is so badly written that reading it will
give you a very good appreciation as to what it must
feel like to be dyslexic, the words just come at you
in a random order.
I've had some great experiences, e.g. Gregory Smith's PostgreSQL 9.0 High Performance. When considering purchasing a book on a niche topic like Magneto or PostgreSQL, I think it's worth waiting for prominent community members to get review copies and write about their impression, e.g. http://www.postgresonline.com/journal/archives/192-PostgreSQ...
Very true; I was trying to avoid Packt for the same reason. Recently, friend of mine shown two books that changed my perception. They're really good (IMHO):
Choose very carefully.
This comment [1] summed the one book I read quite well:
[1] http://www.amazon.co.uk/product-reviews/1849511446/ref=cm_cr...