Each of the museum's employees has secrets they don't want revealed, and when a well preserved "bog body" turns up in the trunk of Dr. Josephine Pulcillo's car, then Pulcillo herself disappears, the action kicks into high gear. Isles and Rizzoli must find her before she becomes another keepsake of the killer who has great knowledge of numerous ancient ways to preserve a human body.

Maura Isles' love affair with the priest, Daniel Brophy, offended me at some level, but aside from that part of the story, The Keepsake is a very entertaining and terrifying novel which I enjoyed immensely, and whose shocking ending I couldn't guess.  I'm looking forward to Gerritsen's next novel, but I hope Maura can find a new romantic interest.