In 1929 New York City, twelve-year-old housemaid Martha O'Doyle suspects that a wealthy recluse may be trying to communicate with the outside world through the paintings on her gallery walls.

Told in multiple voices, fifteen-year-old Jamaican Louisa Adair uncovers an Enigma machine in the small Scottish village where she cares for an elderly German woman, and helps solve a puzzle that could turn the tide of World War II.

"When boarding-school student Oscar Drai meets Marina, she promises him a mystery and takes him to a secret graveyard deep in Barcelona, where they witness a woman dressed in black lay a single rose atop a gravestone etched with a black butterfly. Their curiosity leads them down a dangerous path, and they discover a decades-old conspiracy that puts their lives in the hands of forces more sinister and mystical than they could have believed possible"--...

In 1928 Chicago, eighteen-year-old Ruby, daughter of the state attorney, uses her ability to read minds as a vigilante to hunt out murderers and kill them even if they have not yet committed the crime; Guy works in the morgue, and wants to understand the human body, because maybe then he will learn how it is that he is able to shapeshift into other people--something Ruby plans to use because someone is out to get her father and she is pretty sure...

When two suspicious plane accidents occur near an eastern airport, the two Hardy brothers investigate the case and find themselves in greater danger than they anticipated.

In the 1920s, a ten-year-old newsgirl who aspires to be a reporter at the ChicagoTribune investigates the murder of a gangster.

It's 1953 and the Cold War is on. Communism threatens all that the United States stands for, and America needs every patriot to do their part. So when a Russian boarder moves into the home of twelve-year-old Jake McCauley, he's on high alert. What does the mysterious Mr. Shubin do with all that photography equipment? And why did he choose to live so close to the Air Force base? Jake's mother says that Mr. Shubin knew Jake's dad, who went missing in...

Someone has been stealing and leaving behind little green sneakers, so Bradley, Brian, Nate, and Lucy trail their new teacher, who wears the same shoes in normal size.

"1938. The Golden Age of Hollywood. Palm trees and movie stars. Film studios pumping out musicals, westerns, and gangster films at a furious pace. Everyone wants to be a star--except society girl and aspiring astronomer Kate Hildebrand, who'd rather study them in the night sky. She's already famous after a childhood tragedy turned her into a newspaper headline. What she craves is stability. But when Kate has to move to Hollywood to live with her washed-up...

While on vacation in the Bahamas, the Thea sisters stumble across an old pirate map and endeavor to find the treasure, unaware that someone else is also seeking the prize.