This review was first published by Booklist on July 21, 2021.
**STARRED REVIEW** Our understanding of how the universe works is governed by two models: relativity and quantum mechanics. Both models have proven their accuracy time and again, but we also know that both can’t be true. The quest to marry the two into a single coherent model remains the ultimate goal of physicists. In Where Did the Universe Come From? two physicists explore the various ways our universe is governed by both relativity and quantum mechanics, from its origins in the big bang to the evolution of galaxies, from the death of stars to the heat death of the universe. They also summarize the history of how these concepts developed. They identify the gaps in our understanding and examine ideas for how a “theory of everything” might be forged. The authors do an exceptional job of explaining quantum-physical concepts in layperson’s terms, using examples and metaphors to illuminate the important ideas without the need to understand the mathematics. This is incredibly complicated stuff and it can only be simplified so far. Where Did the Universe Come From? is one of the most accessible summaries of the present state of cosmology on the market.