Old Man's War is a military science fiction novel by American writer John Scalzi, published in 2005. His debut novel was nominated for the Hugo Award for Best Novel in 2006. Old Man's War is the first novel in Scalzi's Old Man's War series. A sequel, The Ghost Brigades, was published in 2006, followed by two other books, The Last Colony (2007) and Zoe's Tale (2008). Another book in the series, The Human Division, was published as a serial and then collected in a novel (2013). The next book in the series, The End of All Things, was published in June 2015 as four novellas. It was optioned by Paramount Pictures in 2011. Plot Introduction Old Man's War is about a soldier named John Perry and his exploits in the Colonial Defense Forces (CDF). The first-person narrative follows Perry's military career from CDF recruit to the rank of captain. It is set in a universe heavily populated with life forms, in which the spacegoing species compete for the scarce planets that are suitable for sustaining life. As a result, Perry must learn to fight a wide variety of aliens. The characters in Old Man's War have enhanced DNA and nanotechnology, giving them advantages in strength, speed, endurance, and situational awareness. Synopsis John Perry, a 75-year-old retired advertising writer, joins the Colonial Defense Forces who protect human interplanetary colonists. Volunteers sign letters of intent and provide DNA samples at age 65, which John and his now deceased wife Kathy had done ten years prior to the beginning of the story. After visiting his wife's grave to say goodbye (as volunteers can never return to Earth), Perry takes a space elevator to the CDF ship Henry Hudson, where he meets Thomas, Jessie, Harry, Alan, Susan and Maggie, fellow retiree volunteers. They dub themselves the "Old Farts". Following a series of sometimes unusual psychological and physical tests, Perry's mind is transferred to a new body based on his genetic material. His new body is a younger version of himself, but genetically engineered with enhanced musculature, green skin, and yellow cat-like eyes. He now possesses enormous strength and dexterity, nanobot-enhanced artificial blood, enhanced eyesight and other senses, and most critically, a BrainPal—a neural interface that, among other capabilities, allows Perry to communicate with other members of the CDF via thought. After a week of frivolity and libertinism in their new bodies, Perry and the