- The Motor Girls on Crystal Bay by Margaret Penrose,  1914-01-01
 - The Motor Girls 
 - The Motor Girls On Crystal Bay or The Secret of the Red Oar by Margaret Penrose,  1914
 - Dorothy Dale's Queer Holidays by Margaret Penrose,  2010-07-12
 - DOROTHY DALE'S CAMPING DAYS #6 by Margaret Penrose,  1911-01-01
 - The motor girls at Lookout Beach: Or, in quest of them runaways (Her The motor girls series) by Margaret Penrose,  1911
 - The Camp Fire Girls of Roselawn by Margaret Penrose,  2009-04-07
 - MOTOR GIRLS ON THE COAST, THE, or The Waif from the Sea, #6 Motor Girls Series by Margaret Penrose,  1913-01-01
 - The Motor Girls or A Mystery of the Road by Penrose Margaret,  1910
 - The Fatal Fifth by Margaret Penrose,  1963
 - The Motor Girls in the Mountains, or the Gypsy Girl's Secret by Margaret Penrose,  1917
 - The Motor Girls Through New England or, Held By the Gypsies by Margaret Penrose,  1911-01-01
 - The Campfire Girls on the Program or Singin and Reciting at the Sending Station by Margaret Penrose, 
 - The radio girls on the program, or, Singing and reciting at the sending station (Radio girls series) by Margaret Penrose,  1922
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