I'm currently reading an ARC of Josh Malerman's UNBURY CAROL (Del Rey), and I'm loving it.

Which leads me to my question: what are some of the BIGGEST differences you've seen between a book's ARC and the wide-release version?

Hopefully the differences are miniscule; maybe just copy edits? To be safe, I'm going to buy the book anyway when it comes out to support the author. But how often do plot changes occur between releases?

Thanks for your help!