- E-bookThe Radio Boys with the Iceberg Patrol; Or, Making safe the ocean lanesAllen Chapman
- E-bookRalph in the Switch TowerAllen Chapman
- E-bookFred Fenton Marathon RunnerAllen Chapman
- E-bookThe Radio Boys at Ocean Point; Or, The Message that Saved the ShipAllen Chapman
- E-bookThe Radio Boys' First Wireless; Or, Winning the Ferberton PrizeAllen Chapman
- E-bookFred Fenton on the Track; Or, The Athletes of Riverport SchoolAllen Chapman
- E-bookFred Fenton Marathon RunnerAllen Chapman
- E-bookRalph on the Overland Express; Or, The Trials and Triumphs of a Young EngineerAllen Chapman
- E-bookBart Stirling's Road to Success; Or, The Young Express AgentAllen Chapman
- E-bookFred Fenton on the Crew; Or, The Young Oarsmen of Riverport SchoolAllen Chapman
- E-bookRalph on the Overland Express; Or, The Trials and Triumphs of a Young EngineerAllen Chapman
- E-bookFred Fenton on the Crew; Or, The Young Oarsmen of Riverport SchoolAllen Chapman
- E-bookFenn Masterson's Discovery or, The Darewell Chums on a CruiseAllen Chapman
- E-bookNed Wilding's Disappearance; or, The Darewell Chums in the CityAllen Chapman
- E-bookRalph on the Engine; Or, The Young Fireman of the Limited MailAllen Chapman
- E-bookRalph of the RoundhouseAllen Chapman
- E-bookRalph, the Train Dispatcher; Or, The Mystery of the Pay CarAllen Chapman
- E-bookBound to Succeed or, Mail Order Frank's ChancesAllen Chapman
- E-bookBart Keene's Hunting Days; or, The Darewell Chums in a Winter CampAllen Chapman
- E-bookFrank Roscoe's Secret; Or, the Darewell Chums in the WoodsAllen Chapman
- E-bookRalph, the Train Dispatcher The Mystery of the Pay CarAllen Chapman
- E-bookThe Radio Boys' First Wireless; Or, Winning the Ferberton PrizeJack Binns
- E-bookRalph on the Engine; Or, The Young Fireman of the Limited MailAllen Chapman
- E-bookFred Fenton on the Track; Or, The Athletes of Riverport SchoolAllen Chapman
- E-bookRalph on the Midnight FlyerAllen Chapman
- E-bookTom Fairfield's Pluck and Luck; Or, Working to Clear His NameAllen Chapman
- E-bookNed Wilding's Disappearance or, The Darewell Chums in the CityAllen Chapman
- E-bookFred Fenton on the Crew; Or, The Young Oarsmen of Riverport SchoolAllen Chapman
- E-bookThe Radio Boys Trailing a Voice; Or, Solving a Wireless MysteryAllen Chapman
- E-bookBart Keene's Hunting Days or, The Darewell Chums in a Winter CampAllen Chapman
- E-bookThe Heroes of the School or, The Darewell Chums Through Thick and ThinAllen Chapman
- E-bookThe Heroes of the School or, The Darewell Chums Through Thick and ThinAllen Chapman
- E-bookThe Radio Boys with the Forest Rangers; Or, The great fire on Spruce MountainAllen Chapman
- E-bookFenn Masterson's Discovery; or, The Darewell Chums on a CruiseAllen Chapman
- E-bookThe Radio Boys at the Sending Station; Or, Making Good in the Wireless RoomAllen Chapman
- E-bookThe Radio Boys at the Sending Station; Or, Making Good in the Wireless RoomJack Binns
- E-bookTom Fairfield's Schooldays or, The Chums of Elmwood HallAllen Chapman
- E-bookThe Radio Boys Trailing a Voice; Or, Solving a Wireless MysteryJack Binns
- E-bookThe Radio Boys at Mountain Pass; Or, The Midnight Call for AssistanceJack Binns
- E-bookBart Stirling's Road to Success; Or, The Young Express AgentAllen Chapman
- E-bookThe Radio Boys with the Forest Rangers; Or, The great fire on Spruce MountainAllen Chapman
- E-bookThe Radio Boys at Mountain Pass; Or, The Midnight Call for AssistanceJack Binns
- E-bookThe Radio Boys at Mountain Pass; Or, The Midnight Call for AssistanceAllen Chapman
- E-bookRalph on the Engine; Or, The Young Fireman of the Limited MailAllen Chapman