And good Book series to read? Already read Twilight and LOVED it, but Im 30 and want something more adult?

II also enjoy the Sookie Stackhouse series, and the Rachel Morgan series by Kim Harrison. I am always looking for something else great to read and when its good...I hate for it to end. Thats why I would like to read a series. Also already read The House of Night series, and The Morganville Vampires, as well as Blue Bloods...HELP!! Is there anything out there that I am missing???