![#155959) THE UNSEEN by Lee Baron [pseudonym]. Robert Lionel Fanthorpe, "Lee Barton."](https://lwcurrey.cdn.bibliopolis.com/pictures/155959.jpg?width=320&height=427&fit=bounds&auto=webp&v=1682000805)
London: John Spencer & Co. (Publishers) Limited, n.d. [1963]. Small octavo, pictorial wrappers. First edition. (#155959)
More Details about THE UNSEEN by Lee Baron [pseudonym
[New York]: Arcadia House, [1966]. Octavo, cloth. First U.S. (and first hardcover) edition. (#21578)
More Details about BARRIER 346 by Carl Zeigfreid [pseudonym
[New York]: Arcadia House, [1966]. Octavo, cloth. First U.S. (and first hardcover) edition. (#22958)
More Details about BEYOND TIME by Marston Johns [pseudonym
[New York]: Arcadia House, [1968]. Octavo, cloth. First U.S. (and first hardcover) edition. (#21720)
More Details about THE IN-WORLD, by Lionel Roberts [pseudonym
[New York]: Arcadia House, [1964]. Octavo, cloth. First U.S. (and first hardcover) edition. (#22959)
More Details about LIGHTNING WORLD by Trebor Thorpe [pseudonym
[New York]: Arcadia House, [1968]. Octavo, cloth. First U.S. (and first hardcover) edition. (#22844)
More Details about NO WAY BACK by Karl Zeigfreid [pseudonym
[New York]: Arcadia House, [1966]. Octavo, cloth. First U.S. (and first hardcover) edition. (#21722)
More Details about ORBIT ONE by Mel Jay [pseudonym
[New York]: Arcadia House, [1968]. Octavo, cloth. First U.S. (and first hardcover) edition. (#22890)
More Details about POWER SPHERE by Leo Brett [pseudonym
[New York]: Arcadia House, [1966]. Octavo, cloth. First U.S. (and first hardcover) edition. (#21725)
More Details about SPACE TRAP by Thornton Bell [pseudonym
Clovis, California: Vega Books, Inc., n.d. [1963]. Small octavo, pictorial wrappers. First U.S. edition. (#74873)
More Details about SPECIAL MISSION by John E. Muller [pseudonym
[New York]: Arcadia House, [1964]. Octavo, cloth. First U.S. (and first hardcover) edition. (#23038)
More Details about TIME ECHO by Robert Lionel [pseudonym
