I thoroughly enjoyed the Foundation Series about a year ago and since then have been reading many of the books found in Asimov's Foundation Universe (http://en.wikipedia.org/wiki/Foundation_series#List_of_books...). Right now I am reading "The Robots of Dawn", the third book in Asimov's Robot Series. I have gone in a kind of a strange order, first reading The Complete Robot, then the Foundation Series, the Empire Series, and now the Robot Series. I have enjoyed them all, I like Asimov's style. I also enjoyed Ender's Game by Orson Scott Card and will be reading the next book in the series "Speaker for the Dead" soon.
You should read Ender's Shadow by Orson Scott Card. Perfect companion piece to Ender's Game (not sure if you know much about it, but it is focused on Bean). I also recently finished the first book in the Foundation Series and need to pick up the second one. Awesome book choices!
