I have a Queen Mountain Man with a D2 blade and cocobolo handles. It's a nice knife, and overall I like it, but it seems like there is just a little bit of play in the blade when it is opened.
It is difficult to sharpen it with anything but a diamond stone. I have one of those large 4"x10" DMT two-sided diamond stones, with 600 grit on one side and 1200 on the other. It just takes a couple of passes and a little bit of stropping to get the Mt. Man extremely sharp.
Regarding books, a couple of really good books that I've read lately (on the non-fiction side of things):
"The Turk", a story about a famous chess-playing automata (mechanical man). If you like chess, you will certainly like this book. Even if you don't know much about chess, it won't be hard to understand.
"Mind Wide Open", about how the mind functions. I'm also looking to pick up "On Intelligence" but can't seem to find it at the library.
I also read "Hyperion" on the suggestion of some forumites, and really enjoyed it. The library didn't have the sequel, so it was quite annoying being stuck with such a cliffhanger sort of ending.