ELLIOTT, Lee. The Wife Swappers Guidebook.

(Los Angeles, CA): Classic Publications, 1968.  First edition.  Paperback original.  190 pages.  Claims to be the first authoritative book to explore the topic of wife-swapping.  Wife swapping became fairly popular in the late sixties, early seventies when widespread contraceptive use took the paternity problem off the table.  A good copy in wrappers, crease to cover, remainder notch to bottom edge.