S. Herman reviewed three books about Cambodia. Two of the books by John Barron (and Anthony Paul) and François Ponchaud were based on interviews with Cambodian refugees and concluded that the Khmer Rouge had killed or been responsible for the death of hundreds of thousands of Cambodians. The third book, by scholars Gareth Porter and George Hildebrand, described the Khmer Rouge in highly favorable terms. Chomsky and Herman called Barron and Paul's book "third rate propaganda" and part of a "vast and unprecedented propaganda campaign" against the Khmer Rouge. He said Ponchaud was "worth reading" but unreliable. Chomsky said that refugee stories of KR atrocities should be treated with great "care and caution" as no independent verification was available. By contrast, Chomsky was highly favorable toward the book by Porter and Hildebrand, which portrayed Cambodia under the Khmer Rouge as a "bucolic idyll." Chomsky also opined that the documentation of Gareth Porter's book was superior to that of Ponchaud's, despite almost all of the references cited by Porter coming from Khmer Rouge documents while Ponchaud's came from speaking to Cambodian refugees. Chomsky and Herman later co-authored a book about Cambodia titled After the Cataclysm (1979), which appeared after the Khmer Rouge regime had been deposed. The book was described by Cambodian scholar Sophal Ear as "one of the most supportive books of the Khmer revolution" in which they "perform what amounts to a defense of the Khmer Rouge cloaked in an attack on the media". In the book, Chomsky and Herman acknowledged that "The record of atrocities in Cambodia is substantial and often gruesome", but questioned their scale, which may have been inflated "by a factor of 100". Khmer Rouge agricultural policies reportedly produced "spectacular" results." Contrary to Chomsky and Herman, the reports of massive Khmer Rouge atrocities and starvation in Cambodia proved to be accurate and uninflated. Many deniers or doubters of the Cambodian genocide recanted their previous opinions, but Chomsky continued to insist that his analysis of Cambodia was without error based on the information available to him at the time. Herman addressed critics in 2001: "Chomsky and I found that the very asking of questions about ... the victims in the anti-Khmer Rouge propaganda campaign of 1975–1979 was unacceptable, and was treated almost without exception as 'apologetics for Pol Pot'." Chomsky's biographers look at this issue in different ways. In Noam Chomsky: A life of dissent, Robert