The book is divided into four parts. Part 1, Medical or Disease Models of Addiction, reviews in three chapters several views, classifications (including Jellinek’s), concepts, and "the quest to discover the biological basis of addiction." Since there are parallels between addiction and gambling, especially in establishing the diagnostic criteria, this part serves as a foundation for part 2, Medical or Disease Models of Pathological Gambling. In seven chapters, the author discusses issues such as gambling and human evolution, Jellinek’s legacy (the disease concept of compulsive gambling), different definitions and diagnoses of pathological gambling, and the treatment goals of abstinence versus moderation (extrapolated from alcohol research). Aasved also provides a critique of the medical and addiction models of gambling. The reader has to get through almost 100 pages before getting to "the quest to discover the biological basis of pathological gambling," which, based on its title, should be the focus of the entire book. Alas, the review of the biology of gambling is a rather (understandably) skimpy hodgepodge of neurotransmitter, comorbidity, intelligence, and family and twin studies.