The Motor Girls on Waters Blue; Or, the Strange Cruise of the Tartar

"The Motor Girls on Waters Blue; Or, the Strange Cruise of the Tartar" by Margaret Penrose is a story about Cora Kimball, who returns from a thrilling ride just as her brother Jack's illness unfolds and as she and her friends, including the Robinson twins, prepare for a voyage to the West Indies amid developing mysteries, including the pressing matter of Inez trying to free her imprisoned father. The novel explores themes of friendship, adventure, and personal change, starting with Cora's adventures and conversations with her friend Bess, soon shifting to concern and a journey that brings challenges and uncertainties, where companionship and intrigue blend together, influencing their lives as the characters face challenges and personal changes.