The book was written by an experimenter for experimenters, as well as for anyone interested in liquid crystals. The book touches on almost all the most important areas of research in these remarkable environments - either almost liquid, or almost solid, and most often both liquid and solid at the same time. And it was these paradoxical structures that turned out to be ideal materials for the most important function of modern electronics and photonics, namely the transmission of digital data directly into the eyes of a person.