Sergio Giovine

"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...

During the Great Depression, aspiring reporter Kit Kittredge uncovers a mystery surrounding a secret room in the rundown mansion owned by elderly Miss Mundis.

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.

Caroline worries that British spies may be lurking in Sackets Harbor, but when strange things start happening at Abbott's Shipyard Caroline wonders if a spy, either someone she has known all her life or Papa's long-lost friend, is responsible.

On a three-day stagecoach ride to the big city of Albany during the War of 1812, eleven-year-old Caroline is fascinated by the other travelers, including a charming magician and a beautiful young woman with a sad past, and when Caroline's important package for her father disappears, she must unmask a thief.