1) im no mod but i suggest not posting threads in multiple forums..
2) i havent got a book, but who knows i should get one.. Now about Wrox, most of there books in programming languages are really good ive heard, and not too sure about PHP, but a assume that it would be as good as the others.
But of course when acquiring a book. Remeber that using the manual can always help, im not too sure on the matter but some books wont go too deep into depth, but Wrox most defainetly will.. But that doesnt mean not to use the Manual..
Check up on things you have learnt from a book in the manual would be a good idea as well.