boxcar children (fictitious characters)

While helping run Jerry Taylor's general store, the Alden children investigate his mysterious employee Nancy.

The Alden family rents a houseboat to drift down the river, and encounters a mystery in the little towns along the river, involving a fast black car.

While visiting the seaport town of Ragged Cove, Massachusetts, the Alden children find the ship's log of the Flying Cloud, shipwrecked in 1869, supposedly during a mutiny.

While canoeing and backpacking near Timberwolf Lake, the Aldens receive strange warnings to stay away from the area and stumble upon clues to a missing cache of stolen coins.

The boxcar children uncover a double mystery involving an old friend of Aunt Jane's.

At an old library, the Alden children discover a boy who needs their help and a stranger who is after a valuable object they found in the library.