The triple hoax
Carolyn Keene
Nancy Drew and friends Bess and George track a group of swindlers and kidnappers from New York to Mexico City to Los Angeles where they finally solve the mystery of the Triple Hoax.

by Alexander McCall Smith (2012)
Before becoming the first female private investigator in Botswana, eight-year-old Precious Ramotswe tracks down a thief who has been stealing her classmates' snacks.
Carolyn Keene
Nancy Drew and friends Bess and George track a group of swindlers and kidnappers from New York to Mexico City to Los Angeles where they finally solve the mystery of the Triple Hoax.
Richard Scrimger
Alan is lost in New York City and being chased by bad guys so he needs all the help that he can get from Norbert, an alien from Jupiter.
Frances and Richard Lockridge
**The Norths Meet Murder** in the top-floor studio of the old house in which they live. Long left vacant, Mrs. North decides it is just the place for a party and takes her husband up to check it out. They open a door - and find a murdered man in a bathtub! With no clue, not even the identity of the corpse, nothing to start from but the Norths and their black cat Pete, Detective Weigand begins spinning his web and gathering into it the most amazing conglomeration of information. With the aid of Mrs. North's "hunches" he carries through to a brilliant, entertaining, and fascinating conclusion. *The Norths Meet Murder* is the 1st book in the *Mr. and Mrs. North Mysteries*, but you may enjoy reading the series in any order.
Franklin W. Dixon
Two unexplainable plane crashes near an airport on the East Coast plunge Frank and Joe Hardy into a bizarre case. When their famous detective father is called to New York City by a group of insurance companies to investigate air freight thefts at Kennedy International Airport, Mr. Hardy asks Frank and Joe to take over his current case of the suspicious plane accidents. From the moment Frank and Joe find a radioactive engine in an airplane junkyard, unexpected dangers strike like lightning. Despite the repeated attempts on their lives, the teen-age detectives pursue their investigation and make a second startling discovery involving contraband uranium isotopes. These two vital clues and others that Frank and Joe unearth provide the solution to one of the most baffling mysteries the boys and Mr. Hardy have ever encountered. - Flyleaf.