I recently stumbled upon the fabulous blog 'Baggage Reclaim' after seeing it referenced on here (lots of stuff on boundaries and relationships), and wondered what your top online sites/books were for reading about this sort of stuff?
Other things I've found from MN are Shirley Glass's Walls and Windows (was transformative for me), and the website 'wait but why'.
I'm also a fan of He's Not That Into You, but know that is a little controversial!
What are yours? Am always looking for new things to read.