I've been learning LaTeX, so I brought home a very nice book I found at the University library: Guide to LaTeX, by Helmut Hopka and Patrick Daly. I've been reading it lately, and I must say I'm very amazed by the power of this software. Kudos to Donald Knuth and everybody else at TeX and LateX projects.
I also brought another book: Mastering Algorithms with C, by Kyle Loudon (O'Reilly). It has very interesting topics: the classic data structures (lists, trees, hashes, etc), data encryption (DES & RSA), data compression (LZ77), sorting and searching, numerical methods, geometric algorithms, etc. It's worth reading it. At least for me.