Through a Glass Darkly & Dark Angels by Karleen Koen in that order.
Elizabeth George's Inspector Lynley books. She's a wonderful writer if you like English style mysteries. They're now a PBS Mystery Theatre series.
Not a series, but Margaret George's Books.... The Autobiography of Henry the Eighth, MARY QUEEN OF SCOTLAND AND THE ISLES,THE MEMOIRS OF CLEOPATRA, Mary called Magdalene, Helen of Troy.
Phillip Pullman - His Dark Materials Trilogy (a young adult series, but just wonderful if you like fantasy with great characters.The Golden Compass, The Subtle Knife, and The Amber Spyglass..
If you can find the English editions even better because each chapter opens with an interesting quote, that seems to be missing in some of the American editions. Now being made into a film. http://www.philip-pullman.com/. These are also wonderful audio books.
For great laughs and and lots of fun to read, the Stephanie Plum series by Janet Evanovich...
Daniel Silva's books featuring art restoring/Israeli spy Gabriel Allon.
Oh boy, I can go on and on.