This paperback book titled "Perry Rhodan 6 - The secret of the time vault" by Clark Darlton was published in 1975. It belongs to the science fiction genre and is part of the Perry Rhodan series. The book is written in English and was published by Orbit. The story revolves around the discovery of a time vault that holds the secrets to the universe. The main character, Perry Rhodan, sets out on a mission to uncover the secrets of the vault and save humanity. This book is a must-read for science fiction enthusiasts and fans of the Perry Rhodan series.