Glenn Sonnedecker in the "American Scientist" gave Inglis's book "The Forbidden Game: A Social History of Drugs" (1975) a negative review. Sonnedecker wrote that Inglis had made assumptions and conclusions without evidence and there was an uncritical use of sources. Inglis in his book "The Diseases of Civilization" (1981) attacked orthodox medical practice. Frank Lesser wrote the book was well referenced. However, the book received a negative review by Charles Fletcher in the "Journal of Medical Ethics" who wrote Inglis was biased and his information was often inaccurate.