At Dawn We Slept: The Untold Story of Pearl Harbor by Prange is probably the most comprehensive book on the subject. I reread it often and learn something new every time. It is by my bedside right now.
Let me add that I am glad we are friends with the Japanese. They have been stalwart friends since the end of WW2 and I'd like to see it stay that way.
Good post over at Neptunus Lex:
http://www.neptunuslex.com/2006/12/07/pearl-harbor/