Grandpa Alden and the Alden children encounter danger, excitement, adventure, and mystery in a quiet island fishing village.

While on a bicycle trip to their aunt's farm, the four Aldens help solve a mystery.

Violet and Jessie begin an adventure out West when they journey to Centerville to keep Aunt Jane company on the family ranch.

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

Recounts the adventures of the Alden children as they solve the mystery of the old schoolhouse in Port Elizabeth.

While on bicycle trip to their aunt's farm, the four Aldens help solve a mystery.

Violet and Jessie begin an adventure when they journey to Centerville to keep Aunt Jane company on the family ranch.

The Alden children have an adventure as they journey along with the Little North Railroad in two cabooses rented for the summer by their grandfat

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

A family, snowbound in a vacation cabin, discovers adventure in surrounding wild life, three children they find in the snow, and a search for a l