"Nancy Drew 52: The Secret of the Forgotten City" by Carolyn Keene is a juvenile fiction book published by Penguin Young Readers Group in 1975. This hardcover book, with illustrations by the author, is part of the Nancy Drew series and follows the captivating mysteries and detective stories of the iconic character. With a thrilling plot and engaging storyline, this 192-page book is sure to captivate young readers with its suspenseful tale of girl detectives solving mysteries in a forgotten city."