"The Dalet Effect" is a popular science book written by a famous Ukrainian physicist and science popularizer. The book presents an interesting and accessible description of one of the least known physical phenomena - the Dalet effect. The author explores the history of the discovery of this phenomenon, recounts interesting facts and examples from life to explain the principles of the Dalet effect and its influence on modern science and technology. In addition, the book contains the author's own thoughts and reflections on the future development of physics and possible applications of the Dalet effect. "The Dalet effect" is an exciting journey into the world of physics, which fascinates with its complexity and incredible possibilities.