Before I voice my opinion, a disclaimer: I have met Cal personally; in fact I'm having diner with him next Monday, I'm writing a book for php|architect, and my company is a Zend partner. I could not be any more biased. If you still trust my judgement (and I will try to remain objective), read on.

Ivo mentions the important things - like how fun the book is to read (a book about a framework, who knew?) and what sort of things it covers. Components of the framework are mentioned but so are things like caching, layouts and web services. I'd give away the ending but that wouldn't be any fun so go check out his unbiased opinion of hos the book turned out.

Well, my first book, php|architect's Guide to Programming with Zend Framework has officially been released in PDF format. You can order it now or pre-order the dead-tree edition. [...] On a related note, the support site for the book, www.zfguide.com is now live.

Right now the site only has a few code examples (the ones mentioned in the book) but he does have plans for a lot more content including some possible "lost chapters" going over what there just wasn't room for between the covers.

Check out some of Marci Tabini's comments on the book and its release as well.