Nate the Great solves the mystery of the missing picture.

Hank the Cowdog investigates reports of a phantom dog on the ranch.

Josie, the seventeen-year-old daughter of a French Quarter prostitute, is striving to escape 1950 New Orleans and enroll at prestigious Smith College when she becomes entangled in a murder investigation.

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

Adrian Lazarus, who became a zombie just before starting middle school, and new friends Gia, Zander, and Talal navigate a mystery involving global warming, disappearing bees, and billionaire developers.

Hank the Cowdog, Head of Ranch Security, uses his keen detective skills to find the ruffian responsible for digging holes in Sally May's garden.

In 1948 Hollywood, a treacherous world of tough-talking private eyes, psychopathic movie stars, and troubled starlets, sixteen-year-old Alice tries to find a young runaway who is the sole witness to a beating that put her sister, Annie, in a coma.

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

Cora, Nellie, and Michiko, teenaged assistants to three powerful men in Edwardian London, meet by chance at a ball that ends with the discovery of a murdered man, leading the three to work together to solve this and related crimes without drawing undue attention to themselves.