[Yoda9864]

I will also have to go with Orson Scott Card. His Ender series is fantastic. I would add Ender's Shadow to your list. It's a very interesting parallel novel to Ender's Game.

I've heard that the Foundation series is also very good. One of my friends read it and gave it rave reviews. I think I'll have to read it sometime. I'm still stuck in the Star Wars EU (extended universe) though.

Timothy Zahn is my all-time favorite sci-fi author. He is one of the best, if not the best, star wars novel writers. He has created the Thrawn Trilogy as well as the Thrawn Duology. Both excellent series' if you're into the star wars EU.

I also like the writings of Micheal A. Stackpole, another Star Wars novelist. Responsible for many of the books in the X-Wing series.

But yeah, that's all for me right now.