When Kirsten's new friend Erik disappears, she has to figure out whether he ran away to get out of some promises he made, or whether something else has happened.

While volunteering as a magazine delivery girl in a convalescent hospital during the Second World War, Molly uncovers a mystery involving the theft of rationed food supplies for sale on the black market.

In 1826, strange occurrences on eleven-year-old Josefina's New Mexican "rancho" lead the young healer to wonder if old legends of lost treasure and the wandering ghost called La Llorona may be true. Includes a Spanish glossary and historical background information.

Samantha investigates when a valuable jewel is stolen during an ocean liner's transatlantic crossing to Europe.

In 1812, ten-year-old Caroline becomes frustrated that her friend Rhonda and cousin Lydia are suddenly acting too grown up to enjoy winter fun with her, and her hurt feelings lead to dangerous decisions. Includes historical notes about growing up in the early nineteenth century.

Luciana is going to space camp, but when picked as the leader for her team, she steers them into trouble. After that her team doesn't trust her, or like her that much either. It's great to be good at science, but she needs more to make it to Mars. Luci needs to become someone her team can depend on, no matter what.

"Elizabeth Cole and her best friend Felicity Merriman are 'the merriest girls in Virginia'--at least, that's what Felicity's father calls them. The girls' favorite form of merriment is teasing Elizabeth's annoying sister Annabelle. When Annabelle Bananabelle becomes engaged, impish Felicity and very funny Elizabeth prove that they are the merriest mischief-makers in Virginia, too! But when their mischief-making heats up, they end up creating big trouble...

Nine-year-old Rebecca Rubin eagerly helps her cousin Ana, newly arrived from Russia, to adjust to life in New York City, but when their teacher says the two must sing together at a school assembly, Rebecca worries that her big moment will be ruined.

In 1765, the arrival of an injured stranger from another tribe, traveling alone and apparently unable to speak, arouses suspicion in Kaya's Nez Perce village. Includes glossary and historical notes on the Nez Perce Indians.

When her family temporarily moves into a luxury apartment building in 1904 Manhattan, eleven-year-old Samantha tries to discover whether a series of mishaps is related to a curse on the building's owner.