The "Hidden World of Birthdays" hardcover book by Judith Turner is a vintage piece published in 1999 by Simon & Schuster. This historical book delves into the alternative therapies, relationships, and astrology related to birthdays, making it a unique read for those interested in personal and professional development. With a focus on the mind, body, and spirit, this book offers insights into folklore and mythology surrounding birthdays, making it a captivating addition to any book collection.