S.
Have you tried any of John Sanford's books? He has a serious I refer to as the "Prey series" - titles include Broken Prey, Hidden Prey, etc. They are really great. Also John Patterson has a serious about a group of women who solve crimes that is really fantastic. So far there are only 4 books in the series but I can't wait for the next one. Plus anything by Patterson is good. I also read a lot of biographies and nonfiction, one of my favorites is "First They Killed My Father". I read it in like a day. Iris Johanson and Tami Hoag are also good mystery authors.
Almost forgot "Daughter of Fortune" is fantastic. It was one of Oprah's bookclub books. My mother-in-law gave it to me and I loved it.