Zhanna Levin has set herself a difficult task - to explain to an inquisitive but not very knowledgeable reader about black holes (which, of course, everyone has heard about, but nothing more!) and gravitational waves, predicted in 1916 by A. Einstein. She spent many hours in conversations with scientists who were closely involved in the creation of the largest interferometers - instruments capable of capturing the sounds of deep space. This book helps us understand just how tortuous and complex the path was that ultimately led to one of the greatest discoveries of recent times: the first experimental detection of gravitational waves by ground-based LIGO laser interferometers. The importance of this landmark event was immediately recognized by the global scientific community, and in 2017 the Nobel Committee awarded the physics prize to Barry Barish, Rainer Weiss and Kip Thorne for their decisive contributions to the creation of the LIGO detector and the discovery of gravitational waves. The publication's layout is saved in PDF A4 format.< /p>