- E-bookDorothy Dale in the WestMargaret Penrose
- E-bookTHE MOTOR GIRLSMargaret Penrose
- E-bookThe Motor GirlsMargaret Penrose
- E-bookThe Motor Girls on Waters Blue; Or, the Strange Cruise of the TartarMargaret Penrose
- E-bookDorothy Dale's Great SecretMargaret Penrose
- E-bookDorothy Dale's Camping DaysMargaret Penrose
- E-bookThe Motor Girls on Crystal Bay; or, The Secret of the Red OarMargaret Penrose
- E-bookDorothy Dale and Her ChumsMargaret Penrose
- E-bookDorothy Dale To The RescueMargaret Penrose
- E-bookThe Campfire Girls of RoselawnMargaret Penrose
- E-bookDorothy Dale's PromiseMargaret Penrose
- E-bookThe Motor Girls on Crystal Bay; or, The Secret of the Red OarMargaret Penrose
- E-bookDorothy DaleMargaret Penrose
- E-bookThe Motor Girls at Lookout Beach; Or, In Quest of the RunawaysMargaret Penrose
- E-bookThe Campfire Girls of Roselawn; Or, a Strange Message from the AirMargaret Penrose
- E-bookDorothy Dale's PromiseMargaret Penrose
- E-bookSéries: iBoo ClassicMargaret Penrose
- E-bookDorothy Dale in the CityMargaret Penrose
- E-bookThe Radio Girls at Forest Lodge; or, The Strange Hut in the SwampMargaret Penrose
- E-bookThe Motor Girls at Camp Surprise; Or, The Cave in the MountainsMargaret Penrose
- E-bookDorothy Dale at Glenwood SchoolMargaret Penrose
- E-bookThe Campfire Girls on Station Island; Or, The Wireless from the Steam YachtMargaret Penrose
- E-bookDorothy Dale's Great SecretMargaret Penrose
- E-bookDorothy Dale's Queer HolidaysMargaret Penrose
- E-bookThe Motor Girls Through New England; or, Held by the GypsiesMargaret Penrose
- E-bookThe Motor Girls on the Coast; or, The Waif From the SeaMargaret Penrose
- E-bookThe Motor Girls on Cedar Lake; Or, the Hermit of Fern IslandMargaret Penrose
- E-bookThe Motor Girls on a TourMargaret Penrose
- E-bookThe Motor Girls in the Mountains; or, The Gypsy Girl's SecretMargaret Penrose