Presents the continuing adventures of Henry York, who has been living in Kansas with his cousins, where he discovers doorways leading to other worlds and becomes involved in a multi-world struggle between good and evil.

After his parents are kidnapped, timid twelve-year-old Henry York leaves his sheltered Boston life and moves to small-town Kansas, where he and his cousin Henrietta discover and explore hidden doors in his attic room that seem to open onto other worlds.

In 1878, twelve-year-old Ida Kate and her widowed father welcome a mail-order bride and her baby to their Kansas homestead, but Ida Kate soon suspects that the bride is not the woman with whom Papa has corresponded.

Lu Wonder, a bright, curious girl who hopes to be a scientist, sets out from her Kansas home in 1855 with her best friend Eustace, a slave, on a journey to Antarctica to protect a mysterious artifact and hide it from the man responsible for her father's death.

Laura and her pioneer family struggle against hardships on the Kansas frontier, including a prairie fire, a grasshopper invasion, and a blizzard.

Sixth-grader Griffin Penshine has always believed wishes can come true, and so when a strange woman curses her with a box of pennies, Griffin fears her evil desires will come true until she returns each penny to the person who first wished upon it.