This is a review of Processor Design: System-on-Chip Computing for ASICs and FPGAs (edited by Jari Nurmi). Because processors are now embedded in SoCs and programmable devices, a system designer is not limited to chips available from major manufacturers. The theory is that a system built of specialized processors will be more efficient, and this book covers a wide range of such customized computer architectures. The book includes three main types of chapters. The first group consists of background information; the second focuses on stages of the processor design process; and the third includes examples of architecture types and experimental architectures, mostly from universities.