Welcome to the Companion Website!

Welcome to the SAGE edge site for Introduction to Criminal JusticeThird Edition.

The SAGE edge site for Introduction to Criminal Justice by Kenneth J. Peak and Tamara D. Madensen offers a robust online environment you can access anytime, anywhere, and features an impressive array of free tools and resources to keep you on the cutting edge of your learning experience.

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Introduction to Criminal Justice: Practice and Process shows students how to think practically about the criminal justice system by offering them a proven, problem-based approach to learning.  Bestselling authors Kenneth J. Peak and Tamara D. Madensen draw on their many years of combined practitioner and academic experience to explain the importance of criminal justice and show how key trends, emerging issues, historical background, and practical lessons can be applied in the field.

The Third Edition of this highly anticipated text continues to build on its success by discussing core topics—policing, corrections, criminal behavior, criminal law, and courts—as well as current issues—ethics, mental illness and crime, illegal immigration—to demonstrate how to solve common problems faced by practitioners in today’s criminal justice system. This student-friendly book offers a palpable, real-world flavor typically missing in other texts for the course.


We gratefully acknowledge Kenneth J. Peak and Tamara D. Madensen for writing an excellent text. Special thanks are also due to Alicia Fisher and Tristin Kilgallon for developing the ancillaries on this site.