"Though a lot of SF writers are more or less efficiently continuing the tradition of Robert A. Heinlein, Scalzi's astonishingly proficient first novel reads like an original work by the late grand master...This virtuoso debut pays tribute to SF's past while showing that well-worn tropes still can have real zip when they're approached with ingenuity." --Publishers Weekly (starred review)

"Solid...[Scalzi] sidesteps most of the cliches of military science fiction, delivers fast-paced scenes of combat and pays attention to the science underpinning his premise." --San Francisco Chronicle

"Thought-provoking!" --Entertainment Weekly

"Smartly conceived and thoroughly entertaining, Old Man's War is a splendid novel." --Cleveland Plain Dealer

"Gripping and surpassingly original. It's Starship Troopers without the lectures. It's The Forever War with better sex. It's funny, it's sad, and it's true." --Cory Doctorow

"John Scalzi is a fresh and appealing new voice, and Old Man's War is classic SF seen from a modern perspective--a fast-paced tour of a daunting, hostile universe." --Robert Charles Wilson

"I enjoyed Old Man's War immensely. A space war story with fast action, vivid characters, moral complexity and cool speculative physics, set in a future you almost want to live into, and a universe you sincerely hope you don't live in already." --Ken MacLeod