"Nichts als die UnWahrheit" by Joern is an insightful professional book that deals with the art of detecting lies. It offers valuable insights into the mechanisms of deception and manipulation, both in professional and personal contexts. The author emphasizes the importance of recognizing the truth in a world full of lies in order to make informed decisions and act successfully. The book is aimed at professionals looking to improve their negotiation skills, as well as HR personnel who want to learn how to uncover fake resumes. Additionally, it provides strategies for gaining clarity in personal relationships and protecting oneself from fraud. With practical tips and illustrative examples, the reader is empowered to identify lies and understand the true intentions of others. This book is an essential guide for anyone who wants to be authentic and successful in their life and career.