The book was first published in 1961. The cover artist is unknown and I couldn’t find any information on Elliott Gilbert either.
Joan Manready’s name appears to be appropriate as she’s ready for any man. I guess the title means that she had too much passion for just one man, like her husband, to satisfy. Her husband is cold, which means that Joan has to seduce (or, as the cover puts it, conquer) the pool boy. Not surprisingly, the pool boy is not putting up much resistance. Speaking for myself, I like the broad shoulders and the abs but the unibrow is a definite turn off.