Henry Carter Hull

In 1871 Wisconsin, thirteen-year-old Georgia sets out to find her sister Agatha, presumed dead when remains are found wearing the dress she was last seen in, and before the end of the year gains fame as a sharpshooter and foiler of counterfeiters.

Aboard "The Boundless," the greatest train ever built, on its maiden voyage across Canada, teenaged Will enlists the aid of a traveling circus to save the train from villains.

Siblings Becca and Doug discover important clues to their missing parents' expedition route and the location of Ur-Can, the fabled Storm City, and they embark on a perilous journey to the Takla Makan desert, racing against their Guild enemies by steam train, riverboat, and airship across the Himalayas, trying to save not only their parents, but the entire planet.

Ethan Cheeseman takes his children, ages eight, twelve, and fourteen, and Captain Jibby and crew, to the year 1668 to end an ancient family curse and save the children's mother, but damage to the time machine and the arrival of Mr. 5 complicate their return.

While sinister Lord Luxon makes himself at home in twenty-first century Manhattan, Peter and Kate, aided by Gideon, pursue The Tar Man through the streets of eighteenth-century London, when history is at its tipping point.

In the spring of 1920, teenaged siblings Rebecca and Doug MacKenzie continue their adventures on their uncle's ship, sailing through a typhoon into the Celebes Sea in pursuit of a missing "gyrolabe" which may be connected to the disappearance of their parents.