The Erotica Book Club for Nice Ladies by Connie Spittler

Lily, a librarian with a bookmobile, arrives in the small California town of Nolan to help start a book club. Across the ocean in an Alsatian chateau, an ancient Book of Cures is stolen and surreptitiously travels to a California coast library, then on to Nolan. Suspicion swirls around the three lonely club members. Unaware of the theft, they secretly pursue their curiosity about classical erotica, while sipping a strange tea infused with herbs grown in a gypsy garden. Mysterious events collide. A crime wave and a murder shake up the town, as the women are entangled deeper and deeper into a baffling puzzle of danger and death.