I'd recommend picking up (or reading again) The Theory of Poker and Hold'em Poker for Advanced players, both by 2+2 publishing. If you're really new to the game, there's quite a few book that can get you started on the terminology and basic concepts, many of wich are reviewed in the Reviews section of the site. I think the Article page also has some texts that are quite succinct and that will give you pointers to start.
It pretty much is a very different game, since many of the key concepts in NL aren't available or have a different application in Limit (effectively pricing out draws, isolation, hand selection, blind resteal, board reading, etc.). The pace of the game is also quite slower, so be prepared to wait.