well im reading frederick pohl right now. but here are my favorites from memory:
Icarus Hunt by: Timothy Zahn
*Hunter's Run by: several authors whom i forgot the name
*Manifold Space by: stephen baxter
**Final Blackout by: L. Ron Hubbard
Times Eye by: arthur c clarke i think
A Very Strange Trip by: several authors again
"*" means extra good books
these are just a few from the top of my head, i have a ton of other favorites as well