Since literature was suggested on another thread, I thought it would be a good idea to share resources on a dedicated thread on the board.
My two favorites are Patricia Evans
and Lundy Bancroft
, who are authors. They tend to focus more on emotional and verbal abuse, but Lundy Bancroft does discuss physical abuse, also. Patricia Evans also has a message board. I have been unsuccessful getting on it, but I know someone in a local support group says it was very helpful for her.
Both of their website contain extensive resource pages, also.