I enjoyed "Bracketology" (and bonus points that I read it the week and a half leading up to the start of the NCAA tournament). I've always followed and liked Lunardi's work, and it was fun to get a sorta behind-the-scenes look at how his methods came about and what the committee does. It's an entertaining read. I especially liked how Lunardi tries to fight for the mid-majors (and I 100% agree that you should have to have a .500 conference record to be eligible for an at-large; like Lunardi give me a 29-5 mid-major over a 17-14 major any day).
Several times Lunardi's wife makes the joke that the story of bracketology isn't a book, it's a pamphlet, and unfortunately this is correct. Even for a quick, short book this is rather stretched, with Lunardi repeating himself a few times in different places (the organization and flow definitely needed some work) and some clearly "filler" sections, like interviews with coaches about bracketology.
I don't think this will appeal to any but the most hardcore college basketball fans but it's worth a look if you are.