The Wireless Operator—With the U. S. Coast Guard

The Secret Wireless / or, The Spy Hunt of the Camp Brady Patrol

The Young Wireless Operator—As a Fire Patrol / The Story of a Young Wireless Amateur Who Made Good as a Fire Patrol

The Flying Reporter

The Young Wireless Operator—With the Oyster Fleet How Alec Cunningham Won His Way to the Top in the Oyster Business

The Young Wireless Operator—Afloat How Roy Mercer Won His Spurs in the Merchant Marine

The Young Wireless Operator—With the U. S. Secret Service