With all the knowledge contained within this book, "Hidden Nature" occupies you, as it arises from within. In his first released volume, David Szczecinski provides a portrait of one of many behaviour profiles, blending rich and telling stories taken from decades of his own experience working in his field as a behaviorial consultant. This volume specifically looks at what Szczecinski describes as the Calculating Profile, further split into 3 categories that are based upon key characteristics, relating to distinctive modes of behaviour. What makes this work unique is that these profiles are examined through the lens of relationships and therefore offer us a glimpse into the lives of our intimate partners, where our understanding is often obscured by our own emotional framing, and a probable lack of information available on the topic. Due to secretive nature of the Calculating Profile described in this volume, it is intriguing, and Szczecinski's detailed portrait is indispensable due to the potential danger that this profile can pose, especially to those who are in an intimate relationship with one. For anyone fascinated with the human condition, this volume of work never fails to pose questions and explore interesting facets to how and why people conduct themselves the way they do. Yet, the reader will not be fully satiated and will be compelled to read the following volumes, when they are released.