Any books on how to overcome fear of physical fighting?

hi im wondering is there any books that would help me get over the fear of confrontation and fear of fighting because iv always been so affraid to stand up too anyone that has insulted my wife and family im not a trouble maker or anything like that but there is times in life that where you have to stand up for yourself and if you have to fight you have too but i just cand seem to do this with fear ect , so can anyone tell me is what books are out there that can help me get rid of this fear as iv heard before from someone that there was but i cant remember the name of them , im in bad need of help here thanks for your time