Sounds like a pretty straightforward question to me. There's no reason to be defensive about flaws in a math book scan, even if it's largely a cool thing.
He edited his comment. Substantially. The original comment told people that because five pages were missing, "either do it right or don't do it at all." That was basically all he said. Great guy, getting me flagged by completely changing his response without acknowledging there was an edit.
Wow, sorry to hear that. Obviously, when it comes to technical information, something is better than nothing.
It's good to know if something's missing so you can go find it, but of course anyone would rather have half a nonfiction book than no book at all, because that still has value.
