These ORIGINAL Doom novels are a series of four officially licensed books, written by Dafydd ab Hugh and Brad Linaweaver. They were released by Pocket Books between June 1995 and January 1996. The books are in NEW condition, the spines are not cracked. There may be some yellowing on the very edge of the pages due to the age of the books. • Knee-Deep in the Dead; released, August 1, 1995 • Hell on Earth; released, August 1, 1995 • Infernal Sky; released, January 1, 1996 • Endgame; released, May 1, 1996 Mfg photo(s), if also shown, are for fit and/or style. There may be slight differences in mfg photos vs item for sale. Ask me if unsure. Colors may look different when viewed on different devices. Ask me if unsure. CLEAN cat-free and smoke-free home.