The secret history (book)

Helloooo, Im starting to read this book that I bought couple of months ago, Initially I read a little in pdf and I liked it a lot, so far it really has me quite intrigued but my reading habits are terrible and it takes me a long time to finish anything 😭. 

Anyways, someone here has read this book? What do you think about it? (pleaaase no spoilers 💀)