What is a good inexpensive book for someone who needs to start over after a divorce?

I wanted to give my mother a book she can relate to, she has just gone through her second divorce, and actually had to move in with my grandmother. She's starting over and tends to jump into relationships quickly, and has now been dating a man for a few months (3-4) and they are already talking about marriage. I want to give her a book with a story about learning to love yourself, getting back on track after a divorce, and not to be afraid if you are alone.