I was looking for a PHP book that wasn't just a reprint of the manual (like most of them are). This book is great for newbies and expirienced programmers alike. This is the book that'll be on your desk 24 a day -- since you'll keep refering back to it.
Should be on every serious PHP developer's book shelf. The only thing I didn't like about the book was that the chapter on PHP and XML didn't provide as much details as I was hoping for. But since I got it really cheap using a coupon from UnderTag.com, I can't really complain.