In its 6th edition, this book is a culmination of more than 10 years of research and writing. A compilation of information benefiting pilots around the world. A single book containing all relevant information from all 14 ATPL subjects. Being a professional pilot, requires a continuous, never-ending dedication to learning and revising. This book is written as a quick reference guide to pilots and aviation enthusiasts, in an effort to simplify the process of staying current and revising aviation theory. Using this book you can within a couple of hours revise a complete subject matter.The book is based on EASA ATPL theory and all information is purely factual. All information in this book is an interpretation of the subject matter researched from not just one but multiple ATPL publications and combined with personal experience and inputs from aviation professionals. Whether you have acquired this book to remain current or simply to prepare for exams or interviews, this book will stay with you until the day you retire.