The Nitrogen Fix by Hal Clement - Vintage Sci-Fi Paperback Book

Four Day Planet & Lone Star Planet H Beam Piper 1979 Ace SciFi Paperback

H. Beam Piper, Uller Uprising, Ace PB, 2/1984, Very Good Condition

Frontier of the Dark by A. Bertram Chandler ( Paperback 1984 )

The Cosmic Compuer - H. Beam Piper Sci Fi Fantasy 3rd Print

Paratime H. Beam Piper 1981 First Ace Printing Mass Market Paperback Scifi

Conan Of The Isles #12 by L. Sprague De Camp 1984 13th Printing Ace Books

The Seven Towers by Patricia C. Wrede (1984, Mass Market)