What other books in the same area have you read? How is A.H. different?
I read it a while ago but I remember James Clear being a really great author in that he really explains in detail why something works and gives a lot of anecdotes.
It's also a really systematic approach to solving the problem of habits. His focus on systems really changed the way I think about managing my attention and my time.
IMO it's probably the best self-help book I've read so far but tbf I haven't read a whole lot of them.