"The Land That Time Forgot" is a fantasy novel written by Edgar Rice Burroughs, the author best known for creating Tarzan. The novel was first serialized in 1918 in Blue Book Magazine before being published as a book in 1924. The story is set during World War I and revolves around the adventures of a diverse group of characters who find themselves on a mysterious and isolated island.

The plot begins with the sinking of a British merchant ship by a German U-boat. The survivors, including the protagonist, Bowen Tyler, and a young woman named Lys La Rue, manage to capture the German submarine. However, they become lost at sea and eventually discover the uncharted island of Caprona in the South Pacific.

Caprona is a unique and perilous land where prehistoric creatures, such as dinosaurs and other extinct species, still exist. The island is divided into different regions, each with its own set of dangers and challenges. As the characters explore the island, they encounter various tribes of primitive humans and face numerous threats from the island's prehistoric inhabitants.

The novel blends elements of adventure, science fiction, and fantasy, creating a thrilling tale of survival in a world untouched by time. Burroughs' vivid imagination and descriptive writing bring the prehistoric landscapes and creatures to life, capturing the reader's imagination. "The Land That Time Forgot" is considered a classic in the genre of lost world fiction and has inspired numerous adaptations in various forms of media over the years.