Sphere by Michael Chrighton is teh good bookness. i read it a while ago and didn't know if it was very popular or not, but it turned out to be really sveet, if a little old.
So if you are looking for a sci-fi lite thing or whatever, i recommend Sphere.
Also, Halo: the Fall of Reach is a good book. okay, now, it sounds dumb since it is based on a video game, but the author did a really good job i thought. It's good stuff.
but enough recommendations from me, nobody needs them anyway...