Vendor mistake was quickly, easily corrected.
Originally I was sent the wrong book. When I emailed Alibris about the error, they contacted the vendor immediately. The vendor sent the correct book on the same day, with an apology. I'd expected more of a hassle, such as having to mail back the first book. Instead, they told me to keep it. (It was a cute book, and I left it in a little free library.). Overall, this was the best possible resolution for the small error.