85 books
The King of the Monkey Men
Plague of the Living Dead
In the Wake of the Buccaneers
Islands And Their Mysteries
The Home Radio - How To Make And Use it
Rivers and Their Mysteries
The Boys' Book of Whalers
Gasolene Engines; Their Operation, Use And Care
Harper's Aircraft Book; Why Aeroplanes Fly, How To Make Models, And All About Aircraft, Little And Big
Knots, Splices and Rope Work
The American Indian
The Bridge of Light
Great Conquerors of South and Central America