I read a book that was so badly proofed that the wrong character’s name was used in a scene. The man, “Al,” was talking to a woman, “Barb,” and during the conversation “Carol” replied to Al. I had to reread the passage several times because Carol wasn’t even in the house, and I was totally confused.I finally figured out that the author meant to write Barb but wrote Carol by mistake, and no one caught it. That’s the worst typo I ever found.