THE BOBBSEY TWINS ON BLUEBERRY ISLAND - MYSTERY AND ADVENTURE - BY LARUA LEE HOPEA charming tale of two sets of twins in the same family, who seem to find adventure and mystery at every turn. This early series was the forerunner of the later series of both Nancy Drew and Hardy Boys Mysteries. Original stories reflect the times. Recommended by the Gunston Trust for Nonviolence in Children's Literature. Ages 6-10.