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Rolf Merkle
Author · 11 books
Rolf Merkle (1952–2019) was a German psychologist, psychotherapist, and author of more than 20 self-help books. He worked in private practice for over 35 years. Together with his wife, psychologist Doris Wolf, he developed the Lebensfreude-Kalender, a German-language calendar focused on personal well-being. In the late 1990s, he also developed the PAL self-help websites. His books and online publications addressed topics including negative and self-defeating thoughts and ways of coping with personal problems.