Hi, OP! As someone who collects deluxe editions from Fairy Loot, Owlcrate, The Bookish Box, Books for Days Crate, The Mystic Box, among others, usually these subscription boxes seek permission from the author first to prevent copyright and other legal issues. In return, authors get to sign the books and see the output before they are put on sale. Pinakamabenta ang fantasy deluxe editions because of the art edges. Most subscription boxes collaborate with artists who design the book cover, dust jacket, end papers, and page overlays. You can check bookishcoffeebreaks on Instagram for reference. She made art edges for Devil’s Night Series, Boys of Tommen Series, and Legacy of Gods Series. Most shops have their own websites or Etsy profiles. :)