this absolutely read like an ao3 story, posted in chapters but then scooped up together and published with a few intro chapters to set up the world. the writing isn't the best and it would have benefitted from an editor review in terms of typos and grammar. it also should not have been written in first person - the twist at the end was interesting but it was too out of pocket for the whole book to have been in first person and the reader not having seen any foreshadowing. 
all that said, the plot and story itself are interesting. the cliffhanger does make me want to read the sequel when it comes out, but unless the writing is a bit better and the characters a bit more dynamic, ill probably pass. i read it in a day so definitely and easy and quick read if thats what you're looking for.