The Moon by Night (ISBN 0-374-35049-3) is the title of a young adult novel by Madeleine L'Engle. Published in 1963, it is the second novel about Vicky Austin and her family, taking place between the events of Meet the Austins (1960) and The Young Unicorns (1968), and more or less concurrently with the O'Keefe family novel The Arm of the Starfish. The book marks the first appearance of the character Zachary Gray, who dates first Vicky and then (in later books) Polly O'Keefe. Although Vicky will later appear in three novels that have fantasy and/or science fiction themes, there are no such elements in The Moon By Night.