By Rocket to the Moon — Otto Willi Gail

First published in English in 1931, this novel for young adults is an accurate mirror of many of the space travel concepts that have been discussed by pre-war European experts. The author s imaginative theories about the history of the Earthmany of which presage those of Velikovksy and von Danikenare explored, and the original illustrations are included as well as an afterword about the author and his sources."