Book excerpt: Fine- and Coarse-Grain Reconfigurable Computing gives the basic concepts and building blocks for the design of Fine- (or FPGA) and Coarse-Grain Reconfigurable Architectures. Recently-developed integrated architecture design and software-supported design flow of FPGA and coarse-grain reconfigurable architecture are also described. Part I consists of two extensive surveys of FPGA and Coarse-Grain Reconfigurable Architectures. In Part II, case studies, innovative research results about reconfigurable architectures and design frameworks from three projects AMDREL, MOLEN and ADRES and DRESC, and, a new classification according to microcoded architectural criteria are described. Fine- and Coarse-Grain Reconfigurable Computing is an essential reference for researchers and professionals and can be used as a textbook by undergraduate, graduate students and professors.