Pick up anything by Neil Gaiman for fantasy/horror, Terry Pratchett's DiscWorld series for satire/fantasy, Brandon Sanderson(Mistborn series and Elantris) for fantasy, George R.R.Martin's Song of Ice and Fire for an epic complex fantasy/adventure, and Patrick Rothfuss for The Name of the Wind, a new series of great potential.
Patricia Briggs also writes a couple of series of fantasy/horror. I like her Mercy Thompson series but jury is still out on her other series. Charlaine Harris, who is probably most famous for her Sookie Stackhouse series, also writes several different mystery/horror series some of which are quite good.