Vintage Star Trek Timescape Novels-The Prometheus Design(1982),The Klingon Gambit (1981). Both are paperbacks published by Pocket Books/Simon & Schuster.
The Prometheus Design- by Sondra Marshak & Myrna Culbreath-ISBN 0671833987,
sci-fy fiction, english, 190 pgs.
The Klingon Gambit- by Robert E. Vardeman-ISBN 0671453580, sci-fy fiction,
english, 160 pgs
Both books are in very good condition, minor shelf wear along edges, top of front cover on The Klingon Gambit has small piece missing , pages are clean, free of markings. There are no rips, creases, tears, or dogg-ears. Some pale yellowing of pages due to age. Books come from smoke free, pet free home.