Knife and number 1

Ten strangers are forced to come face-to-face with their dark pasts after receiving an anonymous invitation to an isolated island off the coast of England.

Ten people are invited to go on an African safari, only to find that an unseen person is killing them one by one. Could one of them be the killer?

Tenacious homicide detective Cassie Mayweather and her still-green partner are working a murder case, attempting to profile two malevolently brilliant young men: cold, calculating killers whose dark secrets might explain their crimes.

Hired by the deceased's ex-wife, a private eye checks out the death of a gay man who had AIDS.