The book of the famous British author John Gribbin, “In Search of Schrödinger's Cat,” which brought him fame, is considered one of the best popularizations of modern physics. Without quantum theory, the existence of modern science is impossible; without it there would be no atomic weapons, television, computers, molecular biology , modern genetics and many other integral components of modern life. John Gribbin tells the story of all of quantum mechanics, the atom, radiation, time travel and the birth of the universe. The book poses the question: “What is reality?” – and comes to the most unexpected conclusions. It shows all the wonder, strangeness and paradox of the consequences that follow from the application of quantum theory. Intended for a wide range of readers interested in modern science.