Eleven-year-old Samantha moves with her family into a luxury Manhattan apartment building in 1904 and soon becomes involved in investigating whether a series of mishaps is related to a curse on the building's owner.

The arrival of an injured stranger from another tribe, traveling alone and apparently unable to speak, arouses suspicion in Kaya's Nez Perce village.

When her family moves to Philadelphia's Society Hill neighborhood in 1866, Addy, a former slave, discovers that her new home holds dangerous secrets--including one connected to the North Carolina plantation she escaped from only two years earlier. Includes an educational section on Reconstruction.

Kit, working as a reporter for the children's page of the "Cincinnati Register," goes to the local theater hoping to do an article on what goes on behind the scenes, and decides to do a bit of investigating on the side when the night's receipts are stolen.

In 1776, eleven-year-old Felicity runs the household while her mother and siblings are away, but is distracted by her horse's ill health, two strangers in town, and the fear that a box of family heirlooms is haunted. Includes historical information aboutlife in colonial Williamsburg.

In 1970s San Francisco, Julie and her best friend Ivy learn about Chinese immigration in the early twentieth century when they investigate a mysterious doll theft.

After Rebecca meets a new family in her New York City apartment building and helps watch their fussy baby while they are moving in, she becomes convinced that they have been victimized by the kidnappers that have been operating in their neighborhood.

While trying to find a way for her elementary school to help fund the seabird rescue following an oil spill in the San Francisco Bay, Julie investigates the theft of rare guitar. Includes a "Looking Back" essay about benefit concerts in the 1970s.

"Marie-Grace can't wait to begin her journey up the Mississippi River with her father. The steamboat they're traveling on is the biggest and fanciest boat Marie-Grace has ever seen. It's crowded with all sorts of interesting passengers, including Wilhelmina Newman, a girl her age. Wilhelmina is traveling alone, and she's carrying a secret in one of her trunks--clues to hidden Gold Rush treasure. Marie-Grace and Wilhelmina have to unravel the clues...

In 1970's San Francisco, Julie is excited to take care of Ivy's talking parrot while her friend is on vacation, but strange things are happening at Ivy's house and an old friend of Julie may be to blame.

Traveling to Paris in 1907 with Grandmary and the Admiral, Samantha and her adopted sister Nellie suspect that someone is trying to harm their beloved grandfather and stop his secret government mission. Includes a glossary of French words and an "Inside Samantha's World" essay about tourism and international tensions in Europe in the early 1900s.