Dave Porter on Cave Island / A Schoolboy's Mysterious Mission

The Rover Boys in the Jungle / Or, Stirring Adventures in Africa

The Rover Boys on the Ocean / Or, a chase for a fortune

The Rover Boys Under Canvas / or The Mystery of the Wrecked Submarine

The Rover Boys in the Air / From College Campus to the Clouds

The Rover Boys on Snowshoe Island / or, The Old Lumberman's Treasure Box