[1] Michael Berg said in a review in the Mathematical Association of America, "I must admit that, as its nutshell predecessor, Einstein Gravity in a Nutshell is very appealing to me, and I am certainly won over by Zee’s chatty but on-the-money style".
[2] Luboš Motl said about the book on his blog The Reference Frame: "Anthony is more playful and less formal but there are aspects in which he gets further than any other introductory textbook of GR.
The book is full of notes, a long index, and simply clever exercises.
[3] Pedro G. Ferreira, professor at the University of Oxford called it "a remarkably complete and thorough textbook on general relativity, written in a refreshing and engaging style.
Zee leads us through all the major intellectual steps that make what is surely one of the most profound and beautiful theories of all time.