The problem with all dead-tree books is that they do get out of date very quickly.
Do you know which three of the Debian trees (Stable, Testing, Unstable) you're expecting to use? A book might be handy for Debian Stable because it does remain so for quite a while ... however, as someone who's a recent newcomer to Debian Testing, I tend to head for online documentation and support first of all ...
Managing Debian doesn't seem an awful lot different from say, Ubuntu, so if you're comfortable with that, I don't think you'll have any major problems once you've got it setup the way you like it (getting all the hardware configured is usually the hardest part and I doubt a book would help you much with that).
My 2p's worth,
Peter.