This comprehensive book showcases different approaches to cognitive behavior therapy (CBT) and focuses on the implementation of these various theories in real-world practice. Following an overview of cognitive therapy, practitioners and scholars discuss behavior therapy, cognitive therapy, rational emotive behavior therapy, multimodal therapy, acceptance and commitment therapy, dialectical behavior therapy, and mindfulness. Each theory highlighted includes a profile of the theorist(s), an overview of the basic principles of the theory, an explanation of the therapeutic process, an array of targeted interventions, a verbatim case transcript with a critique of what was effective and what could have been done differently, an analysis of the limitations of the theory, and reflective sidebars to facilitate learning. The final chapter presents a single case study discussed from the perspective of each particular theory. Contents include: (1) What Is Cognitive Behavior Therapy? (Raymond DiGiuseppe, Rachel Venezia, and Roseanne Gotterbarn); (2) Behavior Therapy (Mark Terjesen, Tara Rooney, Michal Barnea, and Victoria Nicosia); (3) Cognitive Therapy (Silviu A. Matu); (4) Rational Emotive Behavior Therapy (Michael Hickey and Kristene A. Doyle); (5) Multimodal Therapy (Gary B. Kelley); (6) Acceptance and Commitment Therapy (Ioana R. Podina and Daniel David; Case study contributed by Cristina Mogoase); (7) Dialectical Behavior Therapy (Chris Kelly and Diana M. Robinson; Case study contributed by Nora Gerardi); (8) Mindfulness (Anthony Pantaleno and Mark Sisti); and (9) The Case of Marcos From Each Theoretical Perspective.