What is a good book to buy on php cms development?

[gonoDunse]

I would like to build a cms with php using zend framework. I have been disappointed in the past when purchasing programming books only for the author to say, "well this example would not really work well in production." I would like to know if anyone has a recommendation for a book on building a production level cms using php. I prefer zend framework but if you know of a helpful book I am flexible with the frameworks I plan to use.