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Cover of Old Man's War by John ScalziOld Man's War
Modern · Fiction, Science Fiction, War

Old Man's War

by John Scalzi
2005 · 320 pages · Fiction
Critics' pick · Lifetime bestseller
≈ 8 hours to read · about 2 weeks at 30 minutes a day

What it's about

On his 75th birthday, John Perry visits his wife's grave and joins the army. The Colonial Defense Forces recruit only senior citizens, who sign up hoping they'll be made young again to fight humanity's wars among the stars. They are, in a way Perry never imagined, and then they're sent into a galaxy full of aliens who want the same planets we do.

Why it's worth reading

It was Scalzi's first novel, a Hugo finalist and a modern classic of military science fiction. It's fast and funny, with real emotion underneath.

You'll love it if you liked

Good to know

It's the first of a series but stands alone. Expect battle violence and lots of witty banter.

By the numbers

82.0Must-Read Score
  • Readers85 out of 100 · counts 42%
  • Critics58 out of 100 · counts 34% (its stronger lane)
  • Bestseller46 out of 100 · counts 14%
  • Buzz0 out of 100 · counts 10%

Critics and Bestseller are two ways to earn a place: a book's stronger one counts more. Buzz rewards recent bestseller weeks and prizes, so older books start at zero. The parts combine into the Must-Read Score, shown on a scale where the best book we found scores 99 and the last book to make the ranking scores 50.

Where it ranks

Why it made the list

Shortlisted
Hugo Award finalist (2006)Hugo Award finalist (2009, for Zoe's Tale)

Reads as

Epic, Adventurous, Dark

How we rank

Already read it? Upload your Goodreads or StoryGraph history and get the 50 best books you haven't read, tuned to your taste.Get my 50

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Explore the best-of lists

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Quick answers

Is Old Man's War worth reading?

Yes. It was Scalzi's first novel, a Hugo finalist and a modern classic of military science fiction. It ranks #278 of the 2,816 books in our ranking, with a Must-Read Score of 82.0 (the best book we found scores 99).

What is Old Man's War about?

On his 75th birthday, John Perry visits his wife's grave and joins the army. The Colonial Defense Forces recruit only senior citizens, who sign up hoping they'll be made young again to fight humanity's wars among the stars. They are, in a way Perry never imagined, and then they're sent into a galaxy full of aliens who want the same planets we do.

How long does it take to read Old Man's War?

About 8 hours (320 pages), or about 2 weeks at 30 minutes a day.

What should I read after Old Man's War?

If you liked it, try Starship Troopers by Robert A. Heinlein, Leviathan Wakes by James S. A. Corey or The Forever War by Joe Haldeman.