If the silent treatment, relocation and a restraining order don't work against a batshitty ex-boyfriend, enlist the help of a dude in Special Forces. Once he's done, it'll be like the birds never stopped singing.
I don't give books star ratings; I give them bite ratings. This is a bite. A book can get up to five of these evil-looking chompers, including half bites.
You can attribute your own wording to the ratings. Five's the best, three's decent, one and under isn't worth the gas to go to the library. I'll leave it to you to fill in the blanks.