Mysteries in the Mail (Sara Rosett)

What's in the box: The site does not spell out the contents, but the concept points to mystery story material from Sara Rosett sent by post.

Mysteries in the Mail comes from Sara Rosett, a US author best known for cozy and historical mysteries such as the High Society Lady Detective series. The name and the letter writing category suggest a mystery that reaches you as post. That should suit readers who like opening envelopes and piecing clues together slowly. Before you buy, though, the site tells you very little. It does not clearly say what each delivery contains, how often it ships, or how you manage a subscription, so you may need to ask questions or take a small leap of faith. There is also a practical limit. The store is restricted by location, and visitors from some countries are turned away completely. They are pointed to Rosett's ebooks on Kobo, Apple Books and Google Play Books instead. In practice this is mainly a US option. If you already enjoy Rosett's writing, the appeal is clear, because this comes straight from the author and not from a general box company. If you are new to her work, try one of her novels first. It is a cheap, easy way to find out whether her tone and puzzles suit you before you sign up for anything sent to your mailbox.