Does anyone know of a book that covers Flash CS3 from the ground up?
Yes, I think you are asking for too much. The book you want would be 4000 pages long. It makes much more sense to break up the topic into multiple books, and that’s what all the publishers do. Friendsofed.com specializes in Flash books. Any of their books with the words “Foundation” in the title are their beginner books. I recommend (in this order)… — “Foundation Flash [version]” (Friends of Ed) — “Foundation Actionscript [version]” (Friends of Ed) — “Essential Actionscript 3.0” (O’Reilly) — “Actionscript 3.0 Design Patters” (O’Reilly) — “Making Things Movie: Actionscript Animation” (the 3.0 verson — Friends of Ed). Those books should tell you everything you know about Flash. I’m not a Flex developer, but I’d wager than after going through those books, you could pick up any Flex book and it would work for you. If you’re trying to be a comprehensive, you should also read up on Adobe Air.