When a thief takes the box office money at the school play, Cam uses her photographic memory to solve the mystery.

Juvenile fiction. The Hardy boys are called on to help investigate the strange happenings at the dam and reservoir on Skull Mountain and what is causing the water to disappear every night.

The disappearance of a seventeen-year-old girl leads Nancy into an intriguing mystery involving a castlelike building with a drawbridge.

While learning detective skills at a sleep-away camp, Dink and his friends undercover a real mystery involving stolen paintings.

As the race to find the 39 Clues builds to its explosive finish, Amy and Dan must explore an ancient culture and steal a Clue guarded by thousands of the world's best-trained soldiers. It's the most dangerous Clue search yet ... and it may mean the end for Amy and Dan.

When an 18-year-old boy shoots a young woman dead in the middle of a busy Glasgow street and then commits suicide, McCoy knows it can't be a random act of violence. With a newbie partner in tow, McCoy uses his underworld network to build a picture of a secret society run by Glasgow's wealthiest family, the Dunlops. Drugs, sex, incest; every nefarious predilection is catered to, at the expense of the lower echelon of society, an underclass that includes...

Twelve-year-old Andi Boggs discovers evidence of her forgotten namesake, a missing relative, which leads her into a family mystery rooted in the Great Depression.

Fenton Hardy, the famous private detective and father of the Hardy Boys, asks his sons to help him with his latest case involving a criminal named Snattman and the illegal drug trade smuggling of stolen drugs. Hardy directs Frank and Joe to a house on the cliff, whose location overlooking Barmet Bay offers an excellent vantage point to watch for smugglers. The Hardys are tricked into the house by cries for help, and are trapped for a short time in...

"There are rules for murder mysteries. There must be a victim. A suspect. A detective. The rest is just shuffling the sequence. Expanding the permutations. Grant McAllister, a professor of mathematics, once sat down and worked them all out - calculating the different orders and possibilities of a mystery into seven perfect detective stories he quietly published. But that was thirty years ago. Now Grant lives in seclusion on a remote Mediterranean...

Ten brief cases allow the reader to match wits with ten-year-old crime-buster, Encyclopedia Brown, as he investigates such cases as whether a diary of George Washington's mother is authentic, or if a UFO picture supposedly taken by the army is real.