Fifth-grade sleuth Cam Jansen returns in this twenty-sixth entry in David A. Adler's beginning chapter-book series devoted to her crime-solving adventures. When the governor, who is running for president, and two benefactors come to Cam's school for a library-opening ceremony, they are accompanied by Secret Service agents and police. When a loud gunshot-like noice is heard during said ceremony, these figures spring into motion, but for all their experience, they fail to prevent the theft of a valuable pearl necklace, or to even realize that the theft has occurred. It is Cam who stumbles upon the puzzle and, naturally enough, solves it...
Like its predecessors, Cam Jansen and the Secret Service Mystery presents a fairly simple story of suspense, one in which the eponymous heroine's photographic memory - although her real name is Jennifer, our crime-solver's unusual memory led people to nickname her Cam, short for 'camera' - plays a vital role. Unlike other entries in the series, here the help is provided, not by Cam's best friend Eric, who is her usual companion, but by mischievous Danny, who has featured in a few previous entries in the series. I don't know that I found this one of the more convincing entries in Adler's series - it stretched my suspension-of-disbelief a bit, that fifth-grade Cam would understand the sharp report of a falling object better than a Secret Service agent - but I think fans of the character will enjoy the book, and it is to them that I would recommend it.