The Game-Players of Titan
It was most likely written in May 1963 , the Agency received the manuscript on June 4 1963 , and the first edition was a full-size paperback published by Ace Books in January 1964 , before the paperback edition of "The Man in the High Castle" ( first published October 1962 ) , was published in January 1964 . 
<triplet> The Man in the High Castle <subj> October 1962 <obj> publication date