A comprehensive guide to the exploration of the Solar System in 1900 AD. Based on George Griffith's Stories Of Other Worlds, it contains six stories, the illustrations from their original publication, a worldbook taking the story forward to 1920, a spaceship design spreadsheet, five adventures, and more.

Forgotten Futures II contains ASCII text files, grey scale .GIF files, and spreadsheet templates. Now incorporates the novelisation, A Honeymoon In Space and its extra illustrations.