Gothic novel from 1909 about the toxic troubled relationship between two men who love each other and Satan very much

https://www.gutenberg....

seriously I don't know if I just have extremely antiquated taste but this is one of the better books I've read in a while

also there is a queer twist in this book besides the toxic yaoi but I'm not going to say what it is

I should really make a list of Project Gutenberg books by/about queer people