Plant-juice-stained Correspondence is a book presumably written by Rayhun. It can be found on the floor outside his chamber at Rayhun's Headquarters in Broken Valley.

You know, Geshniz, nymphs are part plant and so they do satisfy me. But my lusts are leaning more and more to the... botanical. There must be a combination of advanced grafting and vegetative necromancy that may open new possibilities. Oh, the possibilities!