"Greenlights" is a memoir written by Matthew McConaughey, an American actor and producer. In this book, McConaughey shares his personal experiences, reflections, and life lessons that have shaped him into the person he is today. He discusses his childhood, his rise to fame in Hollywood, and the various challenges and successes he has encountered along the way. McConaughey also delves into his philosophy on life, love, and finding one's own "greenlights" - moments of alignment and fulfillment. Overall, "Greenlights" offers readers an intimate and insightful look into the life and mindset of Matthew McConaughey.