Rejecting charlatanism and mysticism, the author defends the need to carefully collect direct evidence from eyewitnesses (and only them!) regarding the appearance of UFOs, and to include them in a special “catalog of landings”, which already exists and is presented in an abbreviated form in this book. And although this book was published more than 20 years ago, its topic is still relevant and, according to the author, will always be relevant and interesting as long as people have the dream of penetrating the secrets of the unknown. It is for people who strive to know the truth that this book was written.