By Ann Rule. The seldom-seen 1980 BotM hardcover version of this genre hall-of-famer about Rule's friend Ted Bundy...who was also the killer she was tracking.
This ex-library hardback has seen better days for sure: the jacket has a plastic binding, so it's doing okay, but it has library stamps and stickers, and a card sleeve; the spine leans visibly; some of the pages have water damage. A note on the flyleaf also notes "pages loose," and the spine is a bit slack around p. 230, but they'll hold a good while longer IMO. If you've never read this one -- or just want a "heritage" copy to revisit -- this one will get the job done just fine.