Enjoy weird fiction overall, sci-fi and “horror” (in a very general sense). I like some Lovecraft, VanderMeers, Ballard, China Miéville, Samanta Schweblin, late William Gibson, Mariana Enríquez… what recent books or writers caught your eye that may loosely fit the term or are similar to works of the above authors? Can be in English, Portuguese or Spanish.
House of leaves is my all time favourite mindfuck horror literature. I just recommend going hard copy over ebook as the formatting is super important. I can’t really describe it except to say I can see how Backrooms could be inspired by it.