THE CLUE AT SKELETON ROCKS
Hal Keen finds mystery and adventure in and about a lonely lighthouse off the Maine coast.
THE DOOM OF STARK HOUSE
A menacing cloud of mystery hangs over the isolated and snow bound Stark house.
THE LOST MINE OF THE AMAZON
Hal’s sympathy for an exiled white family leads him on to solve the tragic mystery that surrounds the lost mine.
Skippy Dare
courageous—honest—loyal
A young “detective” who keeps his head when trouble starts. And Skippy has a way of being in the thick of things