Regina's Legacy (Sweet Valley High #73) by Francine Pascal (Creator), Kate William - Vintage Paperback

When Elizabeth Wakefield receives a camera as a memento of her friend Regina Morrow, who died recently, she never expects it to plunge her into a dangerous mystery. Then she takes a picture of three suspicious-looking men. One of them tries to grab her new camera, and Elizabeth only narrowly escapes.

Watching TV that night, Elizabeth thinks she sees one of the same men on the news. But this man is accused of being involved in a drug-smuggling operation. Could this be the man in her picture? When the darkroom at school is trashed, Elizabeth knows that something really strange is going on. Someone wants that picture-and will do anything to get it!