The book was authored by Elliott White III and Jonathan D. Eisenhamer, and put out in July 2006 by Sams Publishing (an imprint of Pearson Education). Given today's standards of hefty technical books, this particular one is relatively light, weighing in at 456 pages, which are organized into an introduction, numerous chapters, and three appendices.
The review goes on to detail some of the contents of the book and some of the different perspectives it gives to using the language itself. The book does its best to cover a wide range of topics, but mainly broken up into two parts - PHP internals and applications. Be sure and check out the full review for an even more in depth look at the rest of the book and their thoughts on the validity and usefulness of the book.