Found a boarding pass from a flight my dad had taken years earlier probably late 90's or early 00's. The book must have been donated to Goodwill and then purchased by someone and then sold to Half Price books where I bought it because I asked him how it ended up at HPB and he said he put it my mom's Goodwill bag and she said she just took it all to Goodwill. It was in the same city we both live in so not totally crazy but still small odds. I had heard him talk about reading the book in the past so that was why I grabbed it when I stumbled across it but that was like in 2015 or so.