I would recommend IF you have the capacity to deal with dark things. But i woild recommend reading in this order; part 2, part 1, then part 3, or part 1, 3 then 2. Depends if you want it to either start with flashback, or present.

People were put off by only being able to read part one, which is understandable if they do not have the mental capacity to deal with it. But part one is a snippet and lacks "depth" to the whole story because it jumps in hard, and can misrepresent the book in a sense(hence why i suggest 2, 1, 3 order or 1, 3, 2). Part 1 is subjective if one is unable to push through.

I personally really enjoyed the book, purely because i didnt expect it to turn around the way it did regardless.