[quote author="Dan Kennedy"]Yeah Brad,
The manufacturers stuff is more valuable than most books, because it is all changing so fast. The overviews are fine, but they all do that, but so does the annual Electronics Design issue.[/quote]
It is changing rapidly, although an integrated and systematic presentation is still more to my personal taste. YMMV.
One of the advantages lately to manufacturers' literature: they will give you actual part numbers of the trickier components, e.g. the magnetics. That's half (or more) the battle sometimes.
Also there is freeware that can move you quickly into a viable design---maybe not state-of-the-art, but damn decent especially if you already have some idea about good layout practice etc.