On Dzone.com there's a book review from Ivan Ilijasic covering a recently released title from Packt Publishing, the "PHP Ajax Cookbook" (by Milan Sedliak, Rajesh Jeba R. Anbiah and Roshan Bhattarai). His review gives a "one minute bottom line" about the book and its contents.
I've been in PHP development for more than 10 years and this book is really useful material. I could recommend it to beginners and experienced developers. From my point of view, there are three types of developer books - complete byte-to-byte fat books, introduction books and cookbooks. I want my cookbook to have useful and simple to use recipes. This book fulfilled my expectations.