Sarah Masters Buckey

In 1935, while preparing to write a newspaper story about a theater production of Macbeth in her hometown of Cincinnati, twelve-year-old Kit discovers that a thief is stealing from the box office.

"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...

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.

Volunteering with her friend Cecile at a crowded New Orleans orphanage during the yellow fever epidemic of 1853, Marie-Grace discovers that it is not just the orphans who need help.

While visiting an old castle in England, Samantha and Nellie solve mysteries involving a ghost and some missing rare books. Includes end note about England in the early twentieth century.

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.

While sailing to Europe a legendary sapphire is stolen. Samantha realizes that every passenger is a suspect, and one of them is the thief.