The book "Thrive: an Addicted Novel" by Krista Ritchie and Becca Ritchie tells the tale of two characters, Lily and Lo, as they struggle with addiction and love. The book portrays the strength and power of love while also delving into the complexity of addiction and how it affects relationships. The authors seek to raise awareness of the difficulties associated with addiction through Lily and Lo's journey and to deliver a message of hope to people who are dealing with similar issues. Overall, "Thrive" is a gripping and moving book that provides a fascinating portrait of addiction and its effects on people and relationships.