The Bartimaeus Trilogy
The Batimaeus Trilogy is possibly one of the best trilogys I have ever read. It is inventive in it's lore, creative in it's setting, and it contains excellent mix of humor and action. These are all great reads, and I highly recommend this trilogy. Click the link below for the individual reviews of each book.
The Amulet of Samarkand, Book 1
The Golem's Eye, Book 2
Ptolemy's Gate, Book 3