La Femme infidèle is a novel by French writer Jules Roy (1907–2000), originally published by Gallimard in 1955. Shown here is Signet’s paperback edition of the English translation, published in 1957 as The Unfaithful Wife.
The cover art is by James Avati (1912–2005), a.k.a. the “Rembrandt of Paperback Book Covers”. See also The Paperback Art of James Avati (2005), authored by Kenneth Fulton and Piet Schreuders.