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?
Sentence (from "Charles Wallace Murry"): 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.
Relevant evidence: No