Even for non-counterfeit books, I’ve often got shit quality print-on-demand versions with plates that look like an inkjet printer running low on ink and with the letters having fuzzy boundaries.
I purchased a book this year which included encoding errors. Original greek text which amounted to a couple of quotes was replaced with garbage output. Tables were printed but unformatted. Furthermore, it only included the first 1/2 of the text. The entire second half of the book was missing. I could look past many of these except for the last. Selling half a book is fraud.
For books I've gone from buying on a Kindle to Kobo+OverDrive which I use to check out e-books from the library. But I'm one of those freaks who actually prefers e-ink devices over dead tree books.