The major strength of this book is the first four chapters, which serve as the foundation for how to learn the method in simple language. The book begins with a simple one-dimensional simulation and progresses to a three-dimensional simulation. Each chapter contains a concise explanation of an essential concept and instruction on its implementation into computer code. Projects that increase in complexity are included, ranging from simulations in free space to propagation in dispersive media. Peripheral topics that are pertinent to time-domain simulation, such as Z-transforms and the discrete Fourier transform, are also covered.