"One of the most important books on Earth's roots ever written."
– East West Journal
"Sitchin is a zealous investigator into man's origins . . . a dazzling performance."
– Kirkus Reviews
"Sitchin's works are outstandingly different from all others that present this central theme. His linguistic skills in the languages of antiquity and his pursuit of the earliest available texts and artifacts make possible the wealth of photographs and line drawings appearing in his books from tablets, monuments, murals, pottery, and seals."
– Rosemary Decker, historian and researcher
"Read this book to see from a perspective not often offered. Read it to expand your picture of our tiny existence. And beyond that, just enjoy the theorizing and information provided. There are few places that you can find such a compilation."
– News Worth World in Perspective, Oct 2007
" . . . an array of evidence to support the assertion that the earth had been visited by ancient alien astronauts in its past. Sitchin based his conclusions on the written records of Sumer, the "sudden civilization" that sprang up virtually overnight in the Tigris-Euphrates Valley of modern Iraq."
– American Buddhist Journal, Feb 2009
" . . . [supplies] an array of evidence to support the assertion that the earth had been visited by ancient alien astronauts in its past. Sitchin based his conclusions on the written records of Sumer, the 'sudden civilization' that sprang up virtually overnight in the Tigris-Euphrates Valley of modern Iraq. . . . he found an astonishing array of facts that could be corroborated by modern research. What he found was literally mind boggling in 1976, and it remains so today."
– Wisdom Quarterly: American Buddhist Journal, Feb 2009
“Exciting . . . credible . . . most provocative and compelling. The 12th Planet presents documentation for a radical new theory which, by answering some age-old questions, merely widens the ripples in the pool. (As the author notes, “If the Nefilim . . . created Man on Earth, who created the Nefilim?”)
– Library Journal
“For thousands of years priests, poets, and scientists have tried to explain how man was created. . . . Now a recognized scholar has come forth with a theory that is the most astonishing of all.”
– United Press International