For Sci-Fi have a look at Peter F Hamilton's books
. The Greg Mandel
series is detective fiction set in nthe near(ish) future, the Night's Dawn
trilogy is space opera with fantasy themes, the Commonwealth Saga/Void Trilogy
are space opera with some detective themes, Fallen Dragon
is straight sci-fi. His most recent book Great North Road
is another futuristic detective story set in Newcastle.Alastair Reynolds'
books are straight sci-fi, his Revelation Space
series is (mostly) excellent.
For sci-fantasy have a look at the Deathstalker series
of books. They're quite silly but quite engrossing.