Rose Palmer: One Solitary Twilight

August 1971 is the publication date for Rose Palmer's One Solitary Twilight. This is a Signet contemporary mystery novel about a girl named Polly who use an astrologer to find the murderer of a tenant in Polly's building.

This is an unusual cover for Allan Kass but typical of mysteries and gothics of that date. He gives us a combined illustration of our heroine, the apartment building and the moon. A few other earlier works of his have this same design.