Option theory is difficult. To learn option theory, a beginning professional option trader will get an in- depth education of at least 6 months at a professional trading firm. After learning the theory, it usually takes several years to obtain the necessary trading experience. However, it starts with the theory. There are many books written about options and option theory. Every professional trader is familiar with “Hull” and “Natenberg”. Although these books are very complete, they are also very mathematical and complex. Besides, these books explain the theory, but trading in practice is hardly discussed. There are also very simple books that will go no further than explaining the difference between call- and put options and some option strategies. The author of this book aims to connect option theory and trading in practice. This book is written for the beginning professional or retail investor and is written from the perspective of a trader. This book will teach you all the ins and outs of option theory and after reading this book, you will know exactly what a professional trader knows. It is written according to the vision of the author of how to learn option theory and its practical application. The key concepts are delta-neutral trading and volatility. It is often thought that a retail investor cannot compete with a professional trader, but this is mainly based on the absence of knowledge. This book is all you need to acquire this knowledge and a deep understanding of option theory and trading. Good luck!