I have not read that particular book.
I really enjoyed "How to be an Adult in Relationships" by David Richo.
I think I read it in year 4, maybe year 3.
I know I would not have been open to some of its tenets earlier in R. In particular, Acceptance.
When I did read it. I was ready. For me the scars stay as well. But this book was very helpful to me in moving forward. Acceptance not only of what happened in the A but also the very flawed R that followed.