Our puzzle is the first lines of John Scalzi’s Old Man’s War.
I did two things on my seventy-fifth birthday. I visited my wife’s grave. Then I joined the army.
W QWQ EUZ EXWOAT ZO IG THJHOEG-PWPEX NWYEXQFG. W JWTWEHQ IG UWPH’T AYFJH. EXHO W RZWOHQ EXH FYIG.
In a future time, you can join the intergalactic army at age 75. You get a new, young, enhanced body, which you’re obligated to use as a grunt in endless wars with incomprehensible aliens for two years.
Other novels in the series:
The Ghost Brigades
The Last Colony
The Human Division
The End of All Things