The first book I ever recommend when asked is The Book Of Disquiet by Fernando Pessoa. Not only does the content of the book capture me, but Pessoa’s life too, and how it affected his writing. Other works I’m extremely fond of are To The Lighthouse by Virginia Woolf, Satan’s Diary by Leonid Andreyev, (+The Seven Who Were Hanged, though I can’t attest to the quality of translation in either) Dante’s Inferno, and The Illiad. Very fun! These few are some that I haven’t seen recommended often, even if most are well known, so I hope it can help some. :)