You might try some of Lois McMaster Bujold's Miles Vorkosigan series. I'm a fan, for what it's worth.
Oh hey, that reminds me, if you like science fiction or fantasy, go to Baen Books at
www.baen.com and check out the Webscriptions section. Every single new release they've put out for the past 2 or 3 years is there for purchase in e-book form, and if you don't pay, you still get to read at least the first chapter and in some cases as much as 5 or 6 chapters. They have some good authors (or at least, some ones that I like, including Bujold, David Weber, and John Ringo), and it's a great way to browse through some stuff and see if you like it enough to pay for it.