I love it! Since Oriflamme's will buy back Deep Mysteries for 1 fund each, this means that I can easily turn cheap books into profit. Finally, I can act out my dreams of being a dropshipper!

It is also worth noting that this mod does technically increase the amount of books you get per funds on average, as you get ~10 mysterious books, and gain roughly 1 readable text every 6 books studied. This means instead of the 1 book per funds you get in base game, you get 1.67 books per funds. Nearly double! It just takes a while.

I might consider cutting the time it takes to buy books. I can see arguments for and against the immersive qualities for taking ages to buy each book, or being much faster as you're buying shelves of books indiscriminately. As it stands, I am more considering the more substantial updates mentioned at the end of the description.

Could you make a version that reduces the ammount of time it takes to buy the books to compensate a bit?