The three detectives are his young friends Bob Andrews, Pete Crenshaw and Jupiter Jones. They live in a town near Hollywood. Their stronghold is a salvage warehouse, their headquarters is an old caravan in which they have equipped a crime laboratory. Their agency "Three Detectives" reveals any secrets, riddles and puzzles. Friends detectives boldly take on the most important and complicated cases and bring them to the end with honor.

The Mystery of the Missing Treasure This is about a new case solved by friends Jupiter Jones, Pete Crenshaw and Bob Andrews, who call themselves the Three Investigators . This time they are trying to investigate a mysterious theft in a museum, help a certain lady who is being visited by treacherous gnomes, and experience a bunch of other hair-raising adventures.

The book contains illustrations.