First published in 1915, a best-seller in the 1920s and long out of print, Interplanetary Travel is a short excursion into space physics. Using conundrums, entertaining examples, and unexpected comparisons, Yakov Perelman dispelled some of the public prejudice that prevailed against celestial mechanics and physics of being too abstract and unable to nourish the mind. He explored, in a witty style, the opportunity of successfully completing the flights imagined in some novelists’ wildest fantasies. He checked and corrected their boldest ideas. Even today, this book remains a reference for science students around the world.