Across America, Crime Is A Constant Public Concern. Criminology: Theory, Research, And Policy, Second Edition Provides Comprehensive Coverage Of The Leading Criminological Theories Using Sociology, Psychology, Biology, And Ecology To Explain How And Why Crime Occurs. The Text Combines Classical Criminology With Timely Topics Including Substance Abuse, Gang Violence, Internet Crimes, And Terrorism. Using A Social Sciences Approach, The Authors Discuss How Criminology Influences Public Policy Throughout The Text.