Question: Charles Wallace Murray is a major character in a fantasy/science fiction series of how many young adult novels written by Madeleine L'Engle?

Related documents: [0]  [DOC] The Time Quintet is a fantasy/science fiction series of five young adult novels written by Madeleine L'Engle. [END] 
[1]  [DOC] Charles Wallace Murry is a major character in Madeleine L'Engle's Time Quintet series of young adult science fiction novels. He is first introduced in L'Engle's "A Wrinkle in Time" as the youngest sibling of the protagonist, Meg Murry, and accompanying her on her adventures alongside Calvin O'Keefe. [END]  
Answer: five
five