Like the Beginning Fedora: From Novice to Professional book, I'm searching for a good book regarding Fedora 15 (Lovelock)! Things sure changed from the older versions, so are there any good documentations about the newest, Fedora 15?
Not a paper book, but http://docs.fedoraproject.org/ has some manuals for Fedora 15. More to come, probably, but most of the manuals for version 14 are valid for version 15 as well.
As for what's new, look in the Release Notes document from the same place.