"Greenlights" by Matthew McConaughey, is a non-traditional memoir published in 2020.

It's described as "an approach book" that shares stories, insights, and philosophies from the author's life.

The book is not intended to be a typical memoir focused on nostalgia or an advice book telling readers what to do. Instead, it's a playbook based on the author's personal adventures, offering perspectives that readers can choose to adopt. McConaughey uses his personal diaries, which he kept for 35 years, as the basis for the book. He sees the book as a love letter to life.

The concept of "greenlights" is central to the book. They represent positive affirmations, approvals, and support in life, allowing us to proceed on our chosen path. The book explores how to navigate challenges and see "nos" as potential "yeses" to achieve satisfaction in life.