Universal War (Russian: ВсеЛенская Война Ъ) is an artist's book by Aleksei Kruchenykh published in Petrograd at the beginning of 1916. Despite being produced in an edition of 100 of which only 12 are known to survive, the book has become one of the most famous examples of Russian Futurist book production, and is considered a seminal example of avant-garde art from the beginning of the twentieth century.