Kanazaka
Potential
I recently finished reading Dr. No, which was very good, and had a nice, semi-twist ending. I'm currently halfway through Out of the Silent Planet, by C.S. Lewis. It's pretty good so far, with nice commentary on humanity.
wickedtiger86 agrees: Clan was good. The books after that, the author made her character responsible for every great invention of the stone age so it lost bit of believablity.
A book I'd recommend for you guys to check out is "The Book Thief" by Markus Zusak. It's set during WWII and narrated by Death. So it may not be your cup of tea, but I loved it.
I'm balancing it out with a little Twilight. First time, too. It's not as bad as I expected, and the story is interesting enough, but there are some horrible lines in it. Bella, nervous about her first day of school actually says to her self "Nobody was going to bite me". *headdesk* Apart from the occasional truly awful line like that, I've enjoyed it so far. The absurd sexualisation of Edward is a bit overpowering, but I suppose that's the intended effect. I'm not far enough to pass any real judgement on it yet though.
Other books I'd recommend for summer reading would have to include Kathy Reichs' Temperance Brennan series. The ones that Bones was (loosely) based off. They are very different from the program, but I prefer the books Tempe. And she always drinks Diet Coke. I just like that.
I also loved Belgarath the Sorcerer and Polgara the Sorceress. Very nice books that you can just sit and read. And read. And read. At first they seem to be your standard fantasy fare, but David Eddings has created a deeply interesting world, and I loved the Tolkien-esque scope of history that the Sorcerers live through. Those two books actually helped me through a really rough time - they deal with huge themes like Death and Fate in such a way that you come away understanding them much better without feeling preached to. But to read them you have to have read The Belgariad, a series of novels that I'd also recommend, even if they don't quite match the standard of the prequel novels.