By Westerfeld, Scott 

Hunter Braque, a New York City teenager who is paid by corporations to spot what is "cool," combines his analytical skills with girlfriend Jen's creative talents to find a missing person and thwart a conspiracy directed at the heart of consumer culture.

By Springer, Nancy 

At the age of fifteen, a girl who has spent most of her life moving around the country with her father and brother, filling the emptiness inside her with chocolate, remembers her real name, Sherica, and searches the Internet to learn the truth about her mother and her own past.

By Horowitz, Anthony 

Fourteen-year-old Nick and his bumbling detective brother Tim Diamond investigate a mystery involving international spies and assassins.

By Price, Charlie 

As an eyewitness to two murders, a Montana teenager relates the shocking story behind the crimes in a police interrogation interspersed with flashbacks.

By Ford, John C. 

Eighteen-year-old Christopher, who plans to be a spy, learns of a murder cover-up through his summer job as a morgue assistant and teams up with Tina, a gorgeous newspaper reporter, to investigate, despite great danger.

By Pullman, Philip  In nineteenth-century London, sixteen-year-old Sally Lockhart, a recent orphan, becomes involved in a deadly search for a mysterious ruby. Sequels: The Tiger in The Well, The Shadow in the North

By Cooney, Caroline 

Sixteen-year-old Laura, an American living in London, tries to find the person responsible for the death of her younger brother Billy, who has been killed by a terrorist bomb.

By Carey, Benedict 

When people start vanishing from a desolate trailer park next to the Folsom Energy Plant, friends Lady Di Smith and Tom Jones investigate, using mathematical clues that were hastily planted by their friend Mrs. Clarke before she disappeared.