Clifford M. Will is a world-leading theorist in the verification of general relativity, black holes and gravitational waves. He received his Ph.D. in 1971 from Caltech, and has been on the faculty of Stanford, Washington University and the University of Florida, where he is currently Distinguished Professor. Will has written numerous popular articles and four books, including Was Einstein Right? in 1986, which received many accolades. He is a member of the US National Academy of Sciences, a Fellow of the American Physical Society and of the American Academy of Arts and Sciences, and recipient of the American Physical Society's 2021 Einstein Prize.

Nicolás Yunes is Professor of Physics at the University of Illinois at Urbana-Champaign and Founding Director of the Illinois Center for Advanced Studies of the Universe. Before joining Illinois, he was an Associate Professor at Montana State University, where he co-founded the eXtreme Gravity Institute. He is the author of several review articles on tests of General Relativity and over 170 research papers. He is also the producer of the Celebrating Einstein science festival, the Rhythms of the Universe spoken word event, and the Einstein's Gravity Playlist planetarium show. He is a leader in the use of gravitational wave observations to systematically test Einstein's theory of General Relativity, and is an internationally recognized expert in other aspects of gravity, including black holes and neutron stars. He has received the Young Scientist Prize of the International Union of Pure and Applied Physics.

"I strongly recommend it to all those interested in general relativity. Although non-specialist readers may find it challenging, they will surely be rewarded by its compelling descriptions and fascinating narrative." -- Roberto Lalli, Physics Today

"[Will and Yunes] succeed superbly in describing the history and personalities ... and work diligently ... to explain the science ... Solid insights into Einstein's dazzling discoveries." -- Kirkus Reviews

"Physicists Will and Yunes take readers on an intellectually challenging but invigorating tour of experiments involving Einstein's theory of general relativity ... A valuable treatise on a foundational topic in modern physics." -- Publishers Weekly

"The two authors have not only the broad spectrum of knowledge and personal experience necessary to master the subject, but also the writing skills needed to provide a fresh and witty narrative that is comprehensible to a wide audience... I strongly recommend it to all those interested in general relativity." -- Roberto Lalli, Physics Today

"Will and Yunes provide an entertaining overview of the many tests that general relativity has been put to over the past 100 years or so... In fact, the book contains a lot more interesting stuff - and nice personal anecdotes - than the title suggests... the authors strike the perfect balance between depth and accessibility, using helpful metaphors wherever is necessary." -- Govert Schilling, BBC Sky at Night

"Clifford Will and Nicolás Yunes are celebrating the effectiveness of the general theory of relativity... a genuinely interesting book." -- Brian Clegg, Popular Science