Codependent No More

Codependent No More is the debut book of self-help author Melody Beattie. It introduced the word "codependent" to the world. The book would go on to sell over six million copies in the United States.

The term "codependent" originated as a term to describe people who were involved in relationships with either drug addicted or alcohol addicted spouses or lovers.

In the book, Melody Beattie explains that a codependent is a person who believes their happiness is derived from one person in particular, and eventually the codependent becomes obsessed with controlling the behavior of that one person.