They also finished off a jigsaw puzzle in just 8 months, and that one's box claimed "4-6 years"

With nothing better to do ...

Byram reading group polishes off Proust's " In Search of Lost Time, after seven years.

(To be fair, I never made it past the first ten pages, so reading all 4,000 is some sort of testament to perseverance in a lost cause, but it does remind me of the jigsaw puzzle joke).