In 1951, he published The Weapon Shops of Isher. In the same decade, van Vogt also produced collections and fixups such as The Mixed Men (1952), The War Against the Rull (1959), and the two "Clane" novels, Empire of the Atom (1957) and The Wizard of Linn (1962), which were inspired (like Asimov's Foundation series) by Roman imperial history, specifically the reign of Claudius. His later novels included fixups such as The Beast (also known as Moonbeast) (1963), Rogue Ship (1965), Quest for the Future (1970) and Supermind (1977); expanded short stories such as The Darkness on Diamondia (1972) and Future Glitter (also known as Tyranopolis; 1973); original novels such as Children of Tomorrow (1970), The Battle of Forever (1971) and The Anarchistic Colossus (1977); plus sequels to his classic works, many of which were promised, but only one of which appeared, Null-A Three (1984; originally published in French). Several later books were original in Europe, and at least one novel only ever appeared in Italian.