Chances are good that you have heard the name Apollo at least once. After all, it is the name of one of the most famous theaters in New York City. It is even the name of one of the most important space exploration programs created by NASA. But who was Apollo, and why was he important? In this book, young readers learn that to the ancient Greeks, Apollo was the god of the sun, as well as the god of music and poetry. Both he and his twin sister Artemis played a significant role in the religion of the ancient Greeks, who believed that they and the other gods and goddesses ruled the world.