Both the hunter (in the little open market) and the curator of the museum offer hued editions of books as part of their rewards. I've found four colors so far (although there may be some different shades ... sort of hoping there aren't, there's a limit to how many lockdowns I'm willing to spare for this ) ... a nice little collectible for library-keepers.
(I don't know if the condensed novels are new but "Alice in Wonderland" reduced to four pages is rather amusing)