I used to buy the Unofficial Guide every trip when I went during the 90s. For my first trip back a couple of years ago I bought it on Kindle because I saw how HUGE it was in book form. They have great info but I think you can get as good info on these boards and on several popular blogs as you get in the any of the guidebooks. I was looking at the Birnbaum's 2013 Official guide the other day just for kicks and most of their info for POR was outdated and referenced info about the rooms that were changed about 2 years ago.
Blogs/Websites
www.wdwinfo.com - the parent site of these wonderful boards
www.touringplans.com/blog - these are the same people who do the unofficial guide we all just recommended
www.easywdw.com - an irreverant guide, he does walk-about posts at all the different parks including restaurants and special events like FW,
MNSSHP
www.disneyfoodblog.com - excellent restaurant and FW reviews
disneytourist - great reviews and tips for photography
www.allears.net - great resource for restaurant menus and other info
www.wdwmagic.com - a good site for Disney news including updates on ride closings or new areas like New Fantasyland; they also have a pretty decent forum, but nowhere near as active as the disboards.
www.**************.net - an excellent planning site for first timers
www.wdwprepschool.com - this is also a great resource for first-timers and anyone, her planning binder pages are kind of legendary in some areas of the disboards!
Okay, I think that is enough to keep anybody busy!
Blogs and websites like these are better than books I think because you can generally find a date for the post and easily judge how current the info is. They almost always have great photos, charts or video (
YouTube is also a great resource for videos of rides, parades etc.) included that makes it more interesting. Most of these writers are either local to Orlando or make several trips a year to Disney World and some to
Disneyland as well.