How to identify Unidentified Flying Objects (UFOs)? How to investigate Anomalous Aerospace Phenomena (AAP)?

The reference book "How to identify Unidentified Flying Objects (UFOs)? How to investigate Anomalous Aerospace Phenomena (AAP)?" was conceived back in 2013 by Igor Kalytyuk, with the goal of separating UFO identification and AAP study from the quasi-scientific subculture called Ufology and putting an end to this dispute. To show that it is possible to investigate AAP and identify UFOs within the framework of already recognized scientific disciplines, therefore, there is no need to create a separate science to multiply existence without necessity "pluralitas non est ponenda sine neccesitate".We are not ufologists; UFO identification does not deal with extraterrestrials, does not deal with observations without material evidence and data to which the scientific method cannot be applied, but we can consider independent group observations and data from monitoring complexes and drones. UFO identification is a full-fledged scientific interdisciplinary direction that unites scientists and volunteers. UFO identification has a clear terminology and methodology and invites scientists and everyone who adheres to this vision to cooperate. Unlike ufology, UFO identification requires serious training, and not only the ability to recognize all known natural and man-made phenomeвna, but also the ability to understand modern military experimental developments, distinguish between little-studied natural phenomena, the human factor, and recognize fakes. And the purpose of the AAP study is to investigate little-studied natural phenomena, or copy technologies of unidentified anomalous objects, etc.For 80 years, scattered efforts around the world have produced fragments of data, occasional insights, and endless debate. After all, the typical problem of all these ufologists is that they “reinvent the wheel” over and over again. The main thing is to learn to ask yourself: what is the purpose of doing this? What do we want to achieve? What is needed for this? What was missing was not curiosity, but coherence – a unified methodological framework, a common language, and a set of tools designed for verification rather than belief. This guide aims to become that framework. It is written freely, without funding or institutional backing, yet with the conviction that rigor, transparency, and collaboration are worth more than any budget.The reference book is written in English solely for the convenience of translation into other foreign languages. Anyone willing to translate or add something useful is invited to cooperate.