The Secret of the Ninth Planet by Donald Allen Wollheim

While the circumnavigation of the solar system seems farfetched, it may not be once the problem of effective anti-gravitational control is solved. In this book I have assumed that the many researchers now actually at work on this problem will achieve such a result in the next decade. It is not at all impossible that they may for we all know that the more minds that work at a problem, the sooner it will be solved. The discovery of a means of negating, reversing or… (more)