Pstalemate Science Fiction Paperback Book by Lester Del Rey from Berkley 1973

The Godmakers Science Fiction Paperback Book by Frank Herbert from Berkley 1973

Step to the Stars Science Fiction Paperback Book by Lester Del Rey 1966 1st/1st

Pstalemate by Lester Del Rey Paperback Berkley Medallion Sci-Fi Novel

The Best of Lester Del Rey By Frederik Pohl Ballantine Science Fiction 1976

Siege Perilous Science Fiction Paperback Book by Lester Del Rey from Lancer 1966

Entoverse Science Fiction Paperback Book by James P. Hogan from Del Rey 1992