C. S. Lewis The Space Trilogy 3 Paperback Book Set. Out Of The Silent Planet - 1976 Twentieth Printing, Perelandra - 1976 Eighteenth Printing and That Hideous Strength - 1976 Seventeenth Printing. All books published by Macmillan Publishing Co. Condition of books is good. All spines are Tight/good. No writing, underlining or highlighting on pages. All front covers show signs of wear.Color on front covers is good. All back covers have some yellowing/staining spots. (see All Photos for condition). Pre-owned.