The book is divided into six main sections covering analytic approaches to genetic mechanisms, DNA analysis, molecular biology of receptors and associated proteins, genetics of specific psychiatric disorders, genetics of impulsive-addictive and compulsive disorders, and the genetic impact on behavior. The book is primarily a molecular and statistical genetic text, with less attention to clinical genetics. The sections are well organized and clearly written, but they are quite detailed and technical and assume prior knowledge of molecular genetics, biochemistry, and statistics. Terms such as linkage disequilibruim, RFLPs, exons, and introns are often used without explanation or definition. Thus the book is aimed at scientists and students who are already familiar with the basic concepts of these fields.