The Alden children investigate various mix-ups at a zoo run by their grandfather's friend in an effort to save it not only from pranksters but also from the town council.
The Alden children suspect that the other guests are somehow involved when things begin to disappear at the bed and breakfast where they are staying in Washington, D.C.
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.
During World War II, a young German girl's curiosity leads her to discover something far more terrible than the day-to-day hardships and privations that she and her neighbors have experienced.
Tate Marshall is delighted when a stray dog turns up in the yard one day, but Sable, named for her dark, silky fur, causes trouble with the neighbors and has to go.
Henry Huggins picks up a stray dog, names him Ribsy and sets out on numerous adventures with him, including breeding hundreds of fish and collecting over a thousand worms.
