Wonderful sci-fi book by Gordon R Dickson, and this edition published by Sphere in 1986. The book is in good condition with pages that are crisp and clean with slight tanning of page edges. The cover is paperback and is also in good condition with slight wear to edges and spine. There are no names and no other pen marks inside and would make addition to any collection of those interested in the subject of sci-fi stories.  I sell a number of sci-fi books along with retro and collectable books so please check out my shop, Warm Milk and Cookies. I ship worldwide so please ask for a quote if you do not want to use GSP.