Gertrude Chandler Warner

When their favorite pizza restaurant almost goes out of business, the Alden children try to help their friends stay open while they find out who is behind all their problems.

A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

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.

The Boxcar children investigate when ice cream and other items start disappearing from their favorite ice cream parlor.

Benny wants adventure and finds it as he and the other Alden children help uncover the plan of those who would prevent ballooning from coming to Lloyd's Landing.

While staying at a hotel in New York City, the Aldens investigate a series of annoying pranks plaguing the management and guests.

The children are staying at the home of a famous inventor who was known for her one-of-a-kind clocks. All the clocks make noise especially at midnight, when there are enough chimes, gongs, and clangs to wake the whole house up! But the clocks aren't the only sound in the house at midnight. Someone or something is making a mysterious tapping sound. Who could be inventing trouble in the old house?

While visiting a recent purchase of Grandfather's, a ghost town in the Rocky Mountains, the Aldens encounter a mystery involving a run-down motel and a woman who may be a ghost.

When the Alden siblings go camping on Padre Island, they help save a rare type of sea turtle from a mysterious sabotager.

"The Aldens visit the shore in New Jersey and help out at an amusement pier that is rumored to be unsafe"--