I don't necessarily think she's blaming him for her loss. She is correct that Sanders really did help contribute to the "Crooked Hillary" persona by continually implying that she was bought, even though he was unable to provide a specific example. I have read that Hillary also goes on to write about how her speeches to Goldman Sachs were a terrible idea, and she was naive to think they would be accepted by voters. She also talks about using the private email server as week. So it's not like she's attributing the blame to others exclusively. Rather she's mentioning everything that factored into her loss, whether it was attributed to others or herself. She is literally explaining "What Happened"
Fair enough, but I still don't recall Nixon doing this after losing to JFK or 1962 with the Press Conference.
I don't recall Al Gore doing this either, despite arguably having an even more compelling case to write about [ya' know, since he probably won the election after all].
If President Ford wrote extensively about his loss to Carter, arguably helped by Reagan's challenge, well gee, I don't recall such a book.