> Yesterday, I read a Wikipedia page for a book I’m about to review.

Without buying a new copy of that Wikipedia page on Amazon and comparing it to an old copy from Ebay, there's just no easy way to verify this.

It'd be neat if there were a way to take every letter of these different versions of the Wikipedia articles and pretend they are numbers. Then subtract them from each other, and collate all the ones that don't come out zero.

The author would still have to publish this "difference article" to Amazon so we could universally locate the resource. So I totally understand why they didn't do that expensive work. It's just frustrating nobody has solved this rocket science-level problem in 2026.

All Wikipedia pages have a full record of past versions if you click view history,