this is a trick question for me (and a bit of a funny timing cause i just talked to my spouses about how i never could really pick favourites for Everything) but i will say the book ive read and reread most was 'no longer human' by osamu dazai. i find the pessimism in his work very interesting, especially the masking aspect that is present in this book and how alienated the main character feels (probably my experience as an autistic person talking here lol though its less extreme for me). i do need to reread it soon cause its been a while honestly but yeah, i'd say this one! :3