My wife recently published such an emotional development book in Slovakia [0], and it became a bestseller there. She's now translating and expanding into other countries.
A long term goal for us would be to work directly with authors. We'd love to publicise authors writing quality books, and I imagine it'd be helpful when doing a print run to have 100% confidence X books are going sell.
Unfortunately, we don't yet have enough subscribers for this to work. Because we only use a book once, and our subscribers are split across four age brackets (with different books), we're currently only ordering a small number of each book.
My wife recently published such an emotional development book in Slovakia [0], and it became a bestseller there. She's now translating and expanding into other countries.
It would be nice for our wives to connect :).
[0] https://www.sebavedomie.com/knihy-pre-deti/