Lulu Marketplace

First published in English in 1931, this novel for older children was written by one of the most popular German science fiction writers of the time. Closely based on the work of his friends Hermann Oberth and Max Valier, it is an accurate mirror of many of the space travel concepts being discussed by pre-war European experts. At the same time, the book manages to include Gail's bizarre theories about the history of the Earth, many of which presage those of Velikovksy and von Daniken. The book includes the original illustrations and an afterword about the author and his sources.