Edgar Rice Burroughs

When a German U-boat sinks his ship, Bowen Tyler ends up in the Atlantic with his Airedale, Nobs, and soon he is helping to capture the very submarine that attacked him. His family's yard built it. Now Bowen, a rescued young woman named Lys La Rue, a handful…

On its very first run, Abner Perry's iron mole bores five hundred miles straight down and breaks through into Pellucidar, a hidden world inside the Earth where the sun never moves. Time hardly seems to pass there. David Innes and Perry climb out among cave me…