I've kept this book as much out of sentiment as anything. It's a decent enough text book, although I prefer the Shimon Even book by far. It's just that if I let it go, it'll end up discarded, even though the information is perfectly good. I hate to see useful books trashed, so it lives, for now, in the library.

Update (April 15, 2014): I found a home for it on someone else's bookshelf. ( )