It's great to discover a "new" author, and if they've already produced a series featuring the same character, you have the pleasure of starting at the beginning without having to wait for the next book. Here are some series I recommend.
1. The Southern Vampire Mysteries
Or Charlaine Harris' Sookie Stackhouse novels. You may have seen the TV series "True Blood". Why not try reading the source novels? I'm working my way through them and enjoying every one.