Book 10

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

Book 11


Book 12


Book 13


Book 14


Book 15


Book 16


Book 17

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

Book 18

Bus Station Mystery

by Gertrude Chandler Warner

Published 1 September 1974
The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

Book 19


Book 20


Book 21


Book 22


Book 23


Book 24


Book 25


Book 26


Book 27


Book 28


Book 29