Love Is a Choice: Definitive Book on Letting Go & Is It Love or Is It Addiction?

A lot of 2 books about love and relationships:

Love is a Choice:  The definitive book on letting go of unhealthy relationships, by Hemfelt, Minirth, Meier published in 1989.  The description reads as follows - 
Is It Love or Is It Addiction? by Brenda Schaeffer published in 1997.  The description reads - 
  • Is It Love or Is It Addiction? has helped countless people find their way from the trials and confusions of addictive love to the fulfillment of whole and healthy relationships.