Im not really sure what I can say. My mom has bipolar disorder, and so do i (apparently its rare for it to be passed down to the next generation, and thats a great thing). She might be angry about you writing a book and feel like your writing it abouther and not the disorder. Especially with her saying the 'not your project' thing. Does she have more manic phases than depressive ones?
I know its hard, but try to treat her like a 'normal' person. I get pissed off when people treat me like a disabled person. Maybe you should go to therapy too, so you dont blow up on her.
Is she on meds? She should be on meds.