I've got three kids aged between 10 and 15, and by checking out the horribly damaged sections of the bookcases - these are the best authors:
Jacqueline Wilson Terry Pratchett Christopher Paolini Lemony Snicket Philip Pullman Eoin Colfer J.K. Rowling Louise Rennison C.S. Lewis Garth Nix Roald Dahl Andre Norton Anne McCaffrey
I can't rate the newer books, but I grew up on a steady diet of C.S. Lewis and Andre Norton.
no subject
Jacqueline Wilson
Terry Pratchett
Christopher Paolini
Lemony Snicket
Philip Pullman
Eoin Colfer
J.K. Rowling
Louise Rennison
C.S. Lewis
Garth Nix
Roald Dahl
Andre Norton
Anne McCaffrey
I can't rate the newer books, but I grew up on a steady diet of C.S. Lewis and Andre Norton.