"Library of Souls" is the third book in the Miss Peregrine's Peculiar Children series by Ransom Riggs. It follows the journey of Jacob Portman as he ventures into a mysterious world to rescue his friends, who have been captured by the sinister Wights. The story combines elements of fantasy and adventure, featuring peculiar children with unique abilities. The narrative explores themes of friendship, bravery, and the importance of knowledge. As Jacob navigates the Library of Souls, he discovers the power of the peculiar and the significance of their stories. The book is illustrated with vintage photographs that enhance the storytelling experience.