Inside front cover: "Seven famous science fiction authors present essays on the science and art of writing science fiction. They offer valuable tips and insights to the writer breaking into science fiction, and give the general reader fascinating behind-the-scenes information on how stories are constructed. Originally issued in 1947 in a limited edition by Fantasy Press, Of Worlds Beyond rapidly sold out and soon became a collector's item. In response to many requests, in 1964 Advent arranged with Mr. Eshbach to return the book to print, for the benefit of present-day students of science fiction as well as those who were unable to obtain the first edition..."