How many series does have the adventure novels who's first novel is The Maze of Bones?
The Maze of Bones The Maze of Bones is the first novel of The 39 Clues series, written by Rick Riordan and published September 9, 2008 by Scholastic. It stars Amy and Dan Cahill, two orphans who discover, upon their grandmother Grace's death, that they are part of the powerful Cahill family, whose members constantly fight each other for Clues, which are ingredients to a mysterious serum. The novel has received generally positive reviews.
The Riftwar Saga The Riftwar Saga is a series of fantasy novels by Raymond E. Feist, the first series in "The Riftwar Cycle".