It follows the story of a group of friends - Betty, Mollie, Amy, and Grace - as they embark on a journey to Pine Island, a secluded and mysterious island off the coast of Maine. The book was first published in 1920 and is part of the popular Outdoor Girls series, which was aimed at young girls and was extremely popular in the early 1900s. The series is known for its strong female characters and its themes of adventure, friendship, and independence. In The Outdoor Girls on Pine Island, the girls set out on a summer vacation to the island, hoping to relax and enjoy the beautiful scenery. However, they soon find themselves caught up in a series of mysteries and adventures, including a treasure hunt, a dangerous storm, and encounters with some unsavory characters. Laura Lee Hope's writing is engaging and immersive, drawing readers into the world of the Outdoor Girls and the mysterious Pine Island. The characters are well-developed and relatable, and readers will find themselves rooting for them as they navigate the challenges they face. One of the notable features of the book is its portrayal of strong, independent female characters. The Outdoor Girls are resourceful, intelligent, and brave, and they are not afraid to take charge and solve problems. The book is a great example of the type of literature that was available for young girls in the early 1900s, and its themes of independence and adventure are still relevant today. Overall, The Outdoor Girls on Pine Island is a captivating and exciting read that is sure to delight readers of all ages. Laura Lee Hope's writing is timeless, and the book remains a classic example of early 20th-century children's literature. If you are looking for an adventure-filled novel with strong female characters, The Outdoor Girls on Pine Island is definitely worth a read.