Worlds of If By Greenberg, Martin Harry, Pohl, Frederik, and Olander, Joseph D. Books / Paperback Books ISBN: 0312944721 / Publisher: Bluejay Books, January 1986 Price Starting at $10.14 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Used - Good Good condition. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. $10.14 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for Worlds of If