Does anyone use Postcrossing? I work for them now and they have me writing reviews about books that feature mail or the postal service heavily. Here's my first piece, on a more neglected book from a fave author: https://www.postcrossing.com/blog/2020/07/08/book-review-the-documents-in-the-ca...
I'm taking suggestions for books that fit the theme in comments there, but any ideas you have are great too!