The Marlows and the Traitor is the second in the series of novels about the Marlow family by Antonia Forest, first published in 1953. The story is set during the Easter holidays in a small fishing village on the South Coast. It is the first in the series to feature sailing (see also "Falconer's Lure" and especially "Run Away Home") and the first to have a major male character. In fact there are two significant male characters, Peter Marlow and the traitor. This story, more than most in the series, focuses on the younger members of the family.