You're looking for information on the book "Sentirse Bien" by David Burns, and you'd like to know more about the PDF version. Here's what I found:
Sentirse Bien " (Feeling Good) by Dr. David D. Burns is a foundational work in Cognitive Behavioral Therapy (CBT) that focuses on identifying and refuting negative thought patterns to improve emotional well-being Core Concept: The CBT Formula
Picking out a single negative detail and dwelling on it exclusively. Disqualifying the Positive:
Burns’ signature worksheet invites the reader to a distressing thought, identify the distortion, and replace it with a more balanced alternative. Here’s a quick example in Spanish: