Unmanned Aerial Systems (UAS) or Drones, as they have become widely known, have firmly entered our lives. Whether as a toy, a threat, or a service, they are here, or rather above us, and will be increasingly so. What should we know about the types, uses, risks, and obligations? History, types, categories of Drones Advantages - disadvantages - applications Air traffic rules Meteorology (phenomena, reports, meteorological maps) Aeronautics (instruments, coordinates, maps) Communications (identifiers, priorities, rules) Legislation (drone classes, operator subcategories, operator and operator responsibilities) Technical (batteries, instruments, systems) The human factor (errors, violations, behaviors) The DAGR application of the CAA Ways to capture "points of interest" New operator self-training exercises The new CAA questionnaire, and the answers. A book -aligned with the new EASA regulation- useful for anyone who wants to know about Drones, invaluable for anyone who wants to operate them, and necessary for anyone who wants to become a legal Drone operator. Anastasios H. Kontokostas was born and lives in Athens. He is an unmanned aerial vehicle operator with many years of experience in the field. He is a certified special category UAS operator and holds BVLOS - NF - AW specialties from the CAA. In recent years, he has been active in the rapidly developing field of unmanned aviation, specializing in space security and aerial imaging.