A book is a concise and brief introduction to FPGA devices and their applications. The book presents the main concepts behind FPGA devices. It covers the main concepts of FPGA architecture, programming, and applications. The book also emphasizes the advantages of FPGA vs ASIC when fast device prototyping is needed. The book does not delve into technical concepts but presents subjects in simple, understandable language. I found it a good read before digging deeper into the subject to refresh my FPGA-related knowledge.