Charlie Bone and the Red Knight

Children of the Red King is a series of ten children's fantasy, school and adventure novels written by British author Jenny Nimmo, first published by Egmont 2002 to 2010. It is sometimes called "the Charlie Bone series" after its main character. A series of five books was announced in advance, completed in 2006, and sometimes the books were called the "Red King Quintet" until its continuation.