that, as well as the usual homogeneities and anisotropy, can also have nonlinearities and dispersion, and earlier attempts in this direction, while incorporating the known linear theory, had not fully reproduced the nonlinear equations. In 1981, Mlodinow joined the faculty at Caltech. Later, he was named an Alexander von Humboldt Fellow and worked at the Max Planck Institute for Physics and Astrophysics in Munich, Germany. In 1986, Mlodinow left full-time academia to begin a writing career. In addition to his books, he wrote many episodes for a number of television series including Star Trek: The Next Generation and MacGyver, created computer games with director Steven Spielberg and actor Robin Williams, and wrote the screenplay for the 2009 film Beyond the Horizon. He also continued to conduct research in theoretical physics, and again joined the faculty of Caltech in 2005, leaving in 2013. His latest work in physics concerns the arrow of time, quantum decoherence, and the relation between discrete quantum random walks and the relativistic equations of quantum theory. Works Emotional: How Feelings Shape Our Thinking (2022) () Stephen Hawking: A Memoir of Friendship and Physics (2020) Elastic: Flexible Thinking in a Time of Change (2018) () A new look at the neuroscience of change—and how elastic thinking can help us thrive in a world changing faster than ever before. The Upright Thinkers: The Human Journey from Living in Trees to Understanding the Cosmos (2015) () A history of human progress, from our time on the African savannah through the invention of modern quantum physics.. Subliminal: How Your Unconscious Mind Rules Your Behavior (2012) () Describes how things that we think are conscious, freely made choices, are in fact governed by our subconscious. The War of the Worldviews (2011) () with Deepak Chopra. From their contrasting scientific and spiritual perspectives, the two authors answer the big questions about the universe, consciousness, life, and God. The Grand Design (2010) () with Stephen Hawking. This book argues that invoking God is not necessary to explain the origins of the universe. It became a No. 1 New York Times bestseller. The Drunkard's Walk: How Randomness Rules Our Lives (2008) (), deals with randomness and people's inability to take it into account in their daily lives. The book was a "NY Times notable book of the year". A Briefer History of Time (2005) (), with Stephen Hawking. Feynman's Rainbow: A Search for Beauty in