"Inner Work: An Invitation to True Freedom and Lasting Happiness" by Mat & Ash, The Yoga Couple, Ashley Cottrell, and Mathew Micheletti is a trade paperback book published independently in 2019. The book explores the topic of Hinduism and sacred writings, offering insights on finding true freedom and lasting happiness through inner work. With a focus on religion and personal growth, this book provides a thoughtful journey for readers looking to delve into the depths of their inner selves and discover a path towards enlightenment and fulfillment.