
Old Man's War
John Scalzi · 2005
At 75, you join the Colonial Defense Forces, receive a new body, and fight aliens. Scalzi's 2005 debut is Heinlein for the 21st century, with the militarism played straighter than expected and the old-age perspective lending genuine weight.
Science Fiction & Fantasy · the Pro canon
The case for it, the case against, and the rest of the canon open with Pro.