An I can read mystery

When Mama Cluck loses Arthur, her baby chick, the owl detective finds him boxed for shipment to the children's zoo.

When the Binky brothers get a case involving a missing catcher's mitt, the younger brother proves the better detective and establishes his right to be a full partner in the agency.

When the snow fort is threatened and then wrecked, the obvious suspect is the new boy in the neighborhood.

Big Max, the world's greatest detective, helps the zoo keeper find a missing moose.

Chronicles the series of events occurring after the girls take over the boys' club house.

Wizard, Tubby, Skinny and Snitch are four boys who act as private eyes and try to find Mildred, a missing cat.

George had nobody to play with. Nobody until he found Fred!