The People That Time Forgot by Edgar Rice Burroughs is the second book in the Caspak trilogy, a thrilling blend of adventure and prehistoric fantasy. The story follows Tom Billings as he ventures to the lost island of Caprona to rescue his friend Bowen Tyler, who was stranded there. On the island, Tom discovers a world where evolution occurs in reverse, encountering primitive tribes and dangerous creatures. Along the way, he meets Ajor, a courageous native woman, and the two form a bond as they face countless perils. Readers love the book for its fast-paced narrative, imaginative world, and captivating blend of romance and action.