“I read this book already, but I didn’t recognize it.”
We’ve heard this on a number of occasions, when someone has taken out a book and then brought it back, only to have already read it. It’s not that they forgot; the cover is different! This happens quite often when books are released in other countries…the covers will often change. And while we don’t usually purchase books in other languages, sometimes we will get copies that have been released in England. Sometimes, even the title changes!
You can see a fun list of identical books (inside the covers, at least) right here at The Millions. Have you read any of these? Have you read any a second time by mistake?