Achim Schlöffel is an extreme diver. He was the first person to swim across the English Channel alone and has experienced numerous critical situations during thousands of dives. In 50 thrilling reports, he explains the pull of the depths and how to properly handle fear. He shares his most exciting, dangerous, and beautiful experiences in the fascinating underwater world. He takes us on breathtaking diving expeditions to sunken shipwrecks, unexplored underwater cave systems, and icy mountain lakes, as well as dangerous rescue missions where he risked his life multiple times to save others - not always with success. Additionally, the diving professional provides a wealth of tips for ambitious hobby divers, including his most spectacular wrecks, caves, and dive sites, as well as the ten most important survival rules. One of the first: Between "I can't go on" and "It's impossible" there is always enough air to keep going.