The character Charles Wallace Murry first appears in A Wrinkle in Time, first of a series following his own family and the O'Keefes. Who wrote the series?
Charles Wallace Murry: Charles Wallace Murry is a major character in Madeleine L'Engle's Time Quintet series of young adult science fiction novels. 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. A Wrinkle in Time:  It is the first book in L'Engle's Time Quintet, which follows the Murry and O'Keefe families.
Madeleine L'Engle