Wyn Roosevelt

Frontier boys on the coast

Frontier Boys in Mexico, or Mystery Mountain

Frontier Boys on the Overland Trail

Frontier Boys in Hawaii, or the Mystery of the Hollow Mountain

Frontier Boys in the South Seas

Frontier Boys in the Rockies, or a Winter in the Big Canyon

Frontier Boys in Colorado, or Captured by Indians

Frontier Boys in the Saddle

Frontier Boys in the Sierras

Frontier Boys in Frisco

Frontier Boys on the Coast or in the Pirate's Power

Frontier Boys in the Grand Canyon

Frontier Boys in the Sierras; or, the Lost Mine

Frontier Boys in the Grand Canyon; or, a Search for Treasure