is an excellent writer of high-quality space opera, namely his Culture novels. The latest in this series is Look to Windward.
-> Iain M. Banks booklist
writes hard sf and his main theme is human biology and evolution. He won the Nebula Award for Moving Mars.
-> Greg Bear booklist
is considered as one of the best american authors of hard sf. Among his many books the Uplift series, an excellent space opera, is especially to mention.
-> David Brin booklist
offers a new novel set in his successful Vlad Taltos series: Sethra Lavode.
-> Steven Brust booklist