This is the authoritative presentation of preventive cognitive therapy (PCT), a rigorously tested 8-week program shown to help individuals who have recovered from depression to stay well. PCT developer Claudi L. Bockting reviews the conceptual foundations, rationale, and evidence base for PCT and discusses how it compares to other depression relapse prevention strategies. She explains the ins and outs of PCT implementation with individuals or groups, providing step-by-step guidelines for conducting each session. Ways to overcome common treatment roadblocks and help clients get the most out of take-home assignments are described. In a convenient large-size format, the manual includes 39 reproducible and downloadable handouts and forms.