There appears to be a misunderstanding regarding the title or author of this book. Manuel J. Smith was a famous psychologist known primarily for his work on assertiveness training

Llenándose de Energía Interior " is a fictional book title appearing in the novel Volar sobre el pantano (Flying Over the Quagmire) by Carlos Cuauhtémoc Sánchez. Within the story, it is described as a self-help text with the subtitle "How to break mental chains based on systematic assertive therapy" and is attributed to the real-world psychologist .

" (Filling with Inner Energy) is associated with a different author or a specific chapter/concept in a Spanish translation of a self-help book. Spiritual/Energy Authors : This title sounds more aligned with authors like Brian Weiss Wayne Dyer Eckhart Tolle , who focus on internal energy and spiritual growth. Translation Error

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