Wood has accompanied humans since ancient times as a building material or fuel. This book combines traditional knowledge and interesting facts with new insights. It demonstrates how living with wood can harmonize with the environment and contribute to a healthy living space. This small "Wood Doctor" work aims to provide information and advice to anyone interested in learning more about wood, whether they are a novice, DIY enthusiast, craftsman, or architect. The author is a master carpenter from the Bregenzerwald, who has learned his trade from the ground up, knows and loves the material he works with, and draws from a wealth of professional experience. He aims to preserve the knowledge of our ancestors and constructively integrate it with the latest findings. A respectful relationship with nature and our environment is particularly important to him.