Raivo Hein is an Estonian entrepreneur, best known as the founder of the job portal CV Keskus. In addition to his business activities, Hein is also an amateur astronomer. His book "Taeva puudutus" ("The Touch of the Sky") showcases breathtaking images of the cosmos, offering a unique glimpse into the vastness of the universe. In December 2024, he published a reflective autobiography titled "Termodünaamika II Seadus. Arutelud rahast ja elust" ("The Second Law of Thermodynamics: Discussions on Money and Life"), where he shares his insights and experiences on both entrepreneurship and personal life.