Andrew Tomas (also known as A. Boncza Tomaszewski;1906 - 2001) was a Russian-born author who arguably created the entire 'Ancient Astronauts' genre with his 1935 book The Planetary Doctrine.
During the 70s, the success of Erich von Daniken's books motivated paperback publishers in the US and UK to release new books Tomas had written on the Ancient Astronauts theme. Among these was Sphere Book's release of On the Shores of Endless Worlds.
