The Secret Language of BirthdaysThe Secret Language of Birthdays, authored by Gary Goldschneider and Joost Elffers, is an exceptional book that combines the mystique of astrology, the precision of numerology, and the depth of psychic intuition to offer a comprehensive exploration of one's personality based on their birth date. This unique compilation provides insights into one's strengths, weaknesses, and major life issues, all while offering practical advice and spiritual guidance.