Margaret Penrose
Margaret Penrose was a house pseudonym used by the Stratemeyer Syndicate as the author of three girls' book series published by Cupples & Leon.
The Motor Girls
A young woman and her friends discover the thrills and challenges of owning an automobile, opening the door to new adventures and social dynamics.
By Margaret Penrose
The Campfire Girls on Station Island; Or, The Wireless from the Steam Yacht
When a group of friends learns about a mysterious inheritance of an island riddled with secrets, their summer vacation transforms into a thrilling hunt for treasure and friendship.
By Margaret Penrose
The Motor Girls on Waters Blue; Or, the Strange Cruise of the Tartar
When a group of friends embarks on a journey to the West Indies to confront a mysterious political situation, an urgent rescue mission will test the bonds of friendship.
By Margaret Penrose
The Motor Girls on Cedar Lake; Or, the Hermit of Fern Island
When a group of girls find adventure on a lake during their summer vacation, they uncover secrets and danger beyond their wildest dreams.
By Margaret Penrose
The Radio Girls on the program : $b or, Singing and reciting at the sending station
When a plane crash throws two friends into a thrilling summer of radio, they must balance helping others and navigating their own rivalries.
By Margaret Penrose
The Radio Girls on Station Island: The wireless from the steam yacht
When a girl suddenly claims to own an island, a group of friends find themselves on a surprising, fun adventure.
By Margaret Penrose
The Motor Girls on a Tour
In a time of new freedoms, a group of daring young women take to the open road where their journey sparks excitement and unexpected rivalry.
By Margaret Penrose
Dorothy Dale in the West
Two young women inherit a ranch in the West, leading them on a thrilling adventure filled with mystery and new possibilities.
By Margaret Penrose
The radio girls of Roselawn : $b or, A strange message from the air
In a world of new technology, two friends uncover a dangerous plot involving a possible kidnapping.
By Margaret Penrose
The Motor Girls in the Mountains; or, The Gypsy Girl's Secret
A joyful road trip takes a sharp turn into danger and intrigue when a group of friends encounter a mysterious stranger and a hidden secret in a gypsy camp.
By Margaret Penrose
The Motor Girls on Crystal Bay; or, The Secret of the Red Oar
A summer of sun and motorboats turns into a thrilling quest when a group of young women uncover a mystery that threatens their friend's family.
By Margaret Penrose
Dorothy Dale's Camping Days
Join a group of spirited young friends as they embark on a summer camping trip filled with daring escapades, close calls, and heartwarming camaraderie.
By Margaret Penrose
Dorothy Dale's School Rivals
A daring train adventure leads to a school filled with friendship and rivalry, where a young girl must navigate social challenges and personal growth.
By Margaret Penrose
Dorothy Dale at Glenwood School
Inheriting a fortune, a young girl and her best friend embark on new adventures while navigating friendship, wealth, and the looming shadows of past troubles.
By Margaret Penrose
Dorothy Dale's Promise
When a train ride back to school turns into an unexpected rescue mission, two best friends learn that adventure awaits them around every corner.
By Margaret Penrose
Dorothy Dale's Great Secret
** Amidst the excitement of a new automobile and the secrets of Glenwood School, two best friends confront danger and test their bonds.
By Margaret Penrose
The campfire girls of Roselawn : $b or, A strange message from the air
When two curious friends hear a faint cry for help through the static of a new radio device, they must race to uncover a shocking secret and rescue a young girl from a dangerous situation.
By Margaret Penrose
Dorothy Dale to the rescue
A brave girl and her friend must use their wit and courage to unravel a baffling mystery when her brother vanishes after a suspicious fire.
By Margaret Penrose
The Motor Girls on the Coast; or, The Waif From the Sea
As a group of young friends gear up for a fun summer trip to the coast, they stumble upon a mysterious woman and a hidden problem as their adventure turns into finding out the mystery of the woman and why their vacation is in danger.
By Margaret Penrose
The Motor Girls Through New England; or, Held by the Gypsies
When a group of young female travelers stumble upon a mysterious figure near their cottage, their exciting road trip through New England becomes an unexpected journey filled with challenges, camaraderie, and danger.
By Margaret Penrose