The Motor Boys on the Border: Or, Sixty Nuggets of Gold

The Motor Boys on a Ranch; or, Ned, Bob and Jerry Among the Cowboys: Adventures on the American Frontier: Youthful Cowboys & Ranch Life

The Motor Boys in the Clouds; or, A Trip for Fame and Fortune: A High-Flying Quest for Fortune and Glory

The Motor Boys After a Fortune; or, The Hut on Snake Island: The Quest for Hidden Treasure: A Thrilling Adventure on Snake Island

The Motor Boys Over the Rockies; Or, A Mystery of the Air: Thrilling Adventure Across the Rocky Mountains

The Motor Boys on the Wing; Or, Seeking the Airship Treasure: A High-Flying Adventure of Mystery and Action

The Motor Boys on the Atlantic; or, The Mystery of the Lighthouse: High-Seas Intrigue and Lighthouse Mysteries

The Motor Boys Over the Ocean; Or, A Marvelous Rescue in Mid-Air

The Motor Boys on Thunder Mountain; Or, The Treasure Chest of Blue Rock: Thrilling treasure hunt on Thunder Mountain

The Motor Boys on Road and River; Or, Racing To Save a Life: A Heart-Pounding Race Against Time on Land and Water

The Motor Boys on the Border; Or, Sixty Nuggets of Gold: A Wild West Adventure for Young Readers

The Motor Boys in Strange Waters; or, Lost in a Floating Forest: Navigating a Mysterious Floating Forest: A Thrilling Adventure Story for Young Readers

The Motor Boys Bound for Home; or, Ned, Bob and Jerry on the Wrecked Troopship: Perilous Journey: Teenage Heroes on a Wrecked Troopship

The Motor Boys in the Army; or, Ned, Bob and Jerry as Volunteers: Friendship, Bravery, and Patriotism in the Army: A Thrilling Adventure Novel from the Early 20th Century

The Motor Boys Bound For Home Or Ned, Bob and Jerry On The Wrecked Troopship: The Motor Boys Bound for Home: Ned, Bob, and Jerry's High-Seas Adventure

The Motor Boys on Thunder Mountain Or: The Treasure Chest of Blue Rock

The Motor Boys Bound for Home; Or, Ned, Bob and Jerry on the Wrecked Troopship

The Motor Boys in Mexico; Or, The Secret of the Buried City

The Racer Boys, Or, The Mystery of the Wreck

The Motor Boys on the Pacific: Or, The Young Derelict Hunters