This is a great book and I recommend it strongly. The book is the perfect way to study for the ZEND PHP certification exam!
It includes working examples of code, a download link to the website for scripts.. lots of exam questions which are easy to do, some are hard - all examples, explanations and code answers with comments are included. You can time yourself and start practising. The same format is used through out the book which I like; you can go over multiple topics with consistence. I think an update is in order but for as far as a book the Zend exam.. you will need this book.