In this imaginative novel by Afonso Cruz, a young boy named Elias embarks on an extraordinary journey to find his father, Vivaldo Bonfim, a civil servant who has mysteriously disappeared inside his own library. Following the trail of books his father was reading, Elias dives into the worlds of literary classics. He navigates through stories like 'The Island of Dr. Moreau' and 'Frankenstein,' meeting iconic characters along the way. It's a magical and touching story about the powerful bond between father and son, celebrating the love of reading and the infinite worlds that literature can open up.