In the book "Girls on motors on blue waters; or the strange cruise of Tartarus" by the author Margaret Penrose, readers are waiting for an exciting adventure with fun and brave girls in the main roles. A group of friends go on vacation on a ship called "Tartar", but they have no idea that an incredible round-the-world cruise full of secrets and dangers awaits them. During the trip, the heroines will find a tie and solve riddles, meet new friends and see incredible landscapes. The Motor Girls on Blue Waters; or The Strange Cruise of Tartarus is full of adventure, friendship and courage, and is sure to captivate readers of all ages.