 Principia Mathematica, the landmark work in formal logic written by  Alfred North Whitehead  and  Bertrand Russell,  was first published in three volumes in 1910, 1912 and 1913. A second edition appeared in 1925 (Volume I) and 1927 (Volumes II and III). In 1962 an abbreviated issue (containing only the first 56 chapters) appeared in paperback.