REAL FAKE (Nancy Drew) _written by Carolyn Keene

Nancy, a young girl detective living in River Heights, U.S.A, takes the fleight to Paris, to participate in a reality show called "Mystery Solved". The aim to win the show is to solve a mystery.

This time the mystery of the famous show is the robbery of a diamond necklace. The show crew uses an original costly diamond necklace to make the show really original. Nancy engages herself to find out the fake mystery when someone's scaring her to drop out, which is not part of the show. Nancy doubts that someone's really trying to steal the necklace, and decides to find out the fake mystery, to solve the real one...
My opinion: Very interesting book because of a "double mystery". Another super mystery by Carolyn Keene.