The Night Lives On by Walter Lord (INCREDIBLY informative, and completely fascinating. I literally couldn't put it down.Well okay, I *could*, like, when I had to go to class or something. :-)
A Night to Remeber by Walter Lord. It came before The Night Lives On, and is just as interesting and informative.
Down With the Old Canoe by Steven Biel (It deals with the way society has looked at the disaster across the ages. It's
really interesting.)
James Cameron's Titanic by Ed W. Marsh (need I even say that it was fascinating?)
Titanic: Legacy of the World's Greatest Ocean Liner by Susan Wells. (This has a lot of neat pictures of stuff they recovered from the Titanic in it. Plus it has lots of neat stuff you don't read about anywhere else.)
Umm.. k, that's all I've read. :-) I'm in the progress of reading A Night to Remember by Walter Lord; I love it so far. It's fascinating.