Mass Market Paperback. Condizione: Fair. Engel, Robert V. (illustratore). First Paperback Edition. Cold-War-era sci-fi thriller about the "scientific rivalries which are shaping the course of the world.'' Orig. published by Almat in 1958, this is the FIRST MASS MARKET PAPERBACK EDITION, First Printing, from Pyramid (G339) from that same year, in 157 pages + ads for other titles in rear. Stunning cover art by Robert V. Engel. Original $.35 cover price intact to front cover. Condition is downgraded to Fair due to heavy creasing & slight paper loss to outer (fore edge) side of front cover; first few pages chipped at same corer. Else, very clean & bright & completely unmarked. Pages heavily tanned, commensurate with age & paper quality, but supple. Nicely protected in new clear mylar protector bag Free! Our photos depict the Exact book you will receive, never "stock" images of books we don't actually have! Same day shipping on all orders received Weekdays by 2 pm (Pacific time); later orders, weekends & holidays ship very next business day.