When a boy named Billy follows a 70's man with a 70's hair style, he is suddenly thrust into an underground world filled with mystical creatures, such as dwarves. He finds out that his father was an important man in the land underneath, which is called Inbet. In a battle between good and bad, Retros versus Rock Devils, Billy joins the fight for the Retros. This book is written in the unique style of a medium book. There are short stories and regular books, but this is the best of both worlds. This style allows a more developed plot and more characters, while having more action in less space. Therefore more interesting and exciting, but still an easy to read and quick book. 62 pages