The book "Nonlinear Optical Crystals: A Complete Survey" provides a comprehensive and up-to-date overview of nonlinear optical crystals and their applications. It discusses the fundamental properties of these crystals and their role in the frequency conversion of laser light, which is significant for generating laser radiation at wavelengths that cannot be achieved with conventional sources. The content is of interest to both scientists and engineers working in modern applications in the fields of quantum electronics, optoelectronics, and laser physics. The work also includes the essential mathematical formulas necessary for calculating the frequency conversion process, making it a valuable source of information.