My ex has been medicated for years for a lot of mental issues.

Co-parenting with her was always a nightmare from the start (trying to control my life, insulting, false accusations, getting rude responses if I ask anything about my son, etc).

I've read that you can't co-parent with someone with BPD. The only option is to resort to parallel parenting which is what I do. However that does not stop the constant flow of accusatory emails and insults. She just will not leave me alone.

Lately I noticed that she's trying to influence my son and make him feel guilty that he's spending time with me (things like "oh it's too bad you can't come with us, you're spending time with your dad").

Does anyone have any resources (books, videos, websites, etc) to deal with parental alienation, parenting with a BPD ex or parallel parenting?