Book 11


Book 11


Book 11


Book 12


Book 12


Book 13


Book 13


Book 14


Book 15


Book 16


Book 17


Book 18


Book 19


Book 20


Book 25


Book 27

Solve a Mystery

by Laura Lee Hope

Published 1 February 1934

Book 47

At Big Bear Pond

by Laura Lee Hope

Published 1 January 1954

Book 48

The twins take a bicycle camping trip in order to solve the cases of the missing cat and missing bugle.

Book 49


Book 50