The most counterfeits come from books in my experience.
There seems to be counterfeit printers who will give lower-quality books (runny ink, editing errors, etc. etc.). This is a bigger deal for $100 to $200 textbooks. You're gonna get a lower quality product than the official printers if you buy enough books on Amazon.
No Starch Press was also complaining about it pretty loudly, but Amazon never made a response as far as I'm aware.
I've caught counterfeits of my own. Ligatures (ex: fi or fl) are completely missing from my Art of Electronics 3rd Edition... so my table-of-contents says "ip-ops" instead of "flip-flops". Among other multitudes of errors that is in no errata that I'm aware of.
There seems to be counterfeit printers who will give lower-quality books (runny ink, editing errors, etc. etc.). This is a bigger deal for $100 to $200 textbooks. You're gonna get a lower quality product than the official printers if you buy enough books on Amazon.
https://twitter.com/nostarch/status/1183095004258099202
No Starch Press was also complaining about it pretty loudly, but Amazon never made a response as far as I'm aware.
I've caught counterfeits of my own. Ligatures (ex: fi or fl) are completely missing from my Art of Electronics 3rd Edition... so my table-of-contents says "ip-ops" instead of "flip-flops". Among other multitudes of errors that is in no errata that I'm aware of.
It is also well published to be the case: https://artofelectronics.net/the-book/counterfeit-editions/
And I have one of these counterfeit books myself as proof. Amazon really does have crap counterfeit detection.