Frank Carlson Library

Nate the Great solves the mystery of the missing picture.

Nancy arrives in Phoenix, Arizona, eagerly looking forward to a fun-filled vacation at Shadow Ranch but finds herself embroiled in a baffling mystery involving a phantom horse and buried treasure. Local people believe that the ghostly animal is carrying out the curse of Dirk Valentine, the romantic outlaw who was killed many years ago at Shadow Ranch, where he had gone to fulfill a promise to his sweetheart. Suspecting that a treasure hidden by Valentine...

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

Henry and Benny are suspects when a valuable vase disappears from the local department store where they are working for the summer.

Despite harassment from unknown enemies, Frank and Joe set out to investigate the disappearance of two young men. Their search takes them to desert and mountain regions in California and Arizona.

The adventures of the Alden family as they ride across country in a caboose that has a strange history---or is it a mystery?

Frank and Joe feel that the solution to a counterfeit case and one their father is investigating is hidden in an old mill that is used for making secret parts for missiles.

The young sleuth searches for a treasure hidden in a city now buried under the Nevada desert.

The great detective Seymour Sleuth and his assistant Muggs journey to Egypt to search for a missing stone chicken, an important clue to the location of the Lost Treasure of King Karfu.

In this prequel to the Mysterious Benedict Society series, nine-year-old Nicholas Benedict, an orphan afflicted with an unfortunate nose and with narcolepsy, is sent to a new orphanage where he encounters vicious bullies, selfish adults, strange circumstances, and a mystery that could change his life forever.