Let's say someone's been a conflict-avoidant people-pleaser doormat type their whole life, in constant pursuit of everyone's validation, and always putting everyone else's needs before their own.
What books would you recommend to demonstrate to this type of person how to 'harden up' in order to become more comfortable with confrontation, with voicing their needs / opinions in a healthy assertive way?
More or less, what book(s) would you recommend to help someone overcome a wimpy / doormat mentality?
by _OneAmerican_