The Shadow Theives by Anne Ursa;Cronus Chronicles

The Shadow Theives by Anne Ursa;Cronus Chronicles is about Greek gods once gainwith a modern twist. The heros are Charlotte Mielswetski, a fierce red haired eighth grade girl with anger problems; Charlotte's cousin Zachary(Zee) Miller who moves in with the Mielswetskis after shadow were being stolen from children around him in England; and Bartholomew, Charlotte's adopted cat who is revealed to be Zee's deceased grandmother revived and in a different form. Charlotte, Zee, and Bartholomew must descend down into the Underworld ruled by Hades, battle Philonecron(a descendant of Hades), and rescue the shadows of the kids. A good read for any age.