The Pony Rider Boys in the Ozarks; Or, The Secret of Ruby Mountain

Grace Harlowe's Overland Riders at Circle O Ranch

The Boy Scouts in the Saddle

The Pony Rider Boys in Alaska; Or, The Gold Diggers of Taku Pass

The Pony Rider Boys in Louisiana; or, Following the Game Trails in the Canebrake

The Pony Rider Boys in Montana; Or, The Mystery of the Old Custer Trail

The Pony Rider Boys in New England; or, An Exciting Quest in the Maine Wilderness

The Pony Rider Boys in New Mexico; Or, The End of the Silver Trail

The Pony Rider Boys in Texas; Or, The Veiled Riddle of the Plains

The Pony Rider Boys in the Alkali; Or, Finding a Key to the Desert Maze

The Pony Rider Boys in the Grand Canyon; Or, The Mystery of Bright Angel Gulch