"Secreto Más Extraño" by Earl Nightingale is a 2021 trade paperback book published by Sound Wisdom. It is a self-help book focused on personal growth, happiness, and success, offering motivational content in English. With 128 pages, this officially published work by Nightingale Conant provides insights and guidance for readers looking to enhance their lives in various aspects related to business and economics. The compact size of 7 inches in length and 5 inches in width makes it a convenient read for those seeking inspiration and practical advice in their personal and professional journeys.
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