action adventure novel：
Og - Son of Fire
The Old Tobacco Shop
The Outdoor Chums in the Big Woods
The Outdoor Girls at Bluff Point
The Outdoor Girls at Foaming Falls
The Outdoor Girls at Ocean View
The Outdoor Girls at Rainbow Lake
The Outdoor Girls at the Hostess House
The Outdoor Girls at Wild Rose Lodge
The Outdoor Girls in a Motor Car
The Outdoor Girls in a Winter Camp
The Outdoor Girls in the Saddle
The Outdoor Girls of Deepdale
Ozma of Oz
Ozma of Oz (version 3)
Ozoplaning with the Wizard of Oz
Pee-Wee Harris (Version 2)
Pee-Wee Harris Adrift
Pee-wee Harris F. O. B. Bridgeboro
Pee-Wee Harris in Luck
Pee-Wee Harris on the Trail
Pee-Wee Harris: Fixer
Peter and Wendy