This is an amazing book! With this book, Andrew Barron has written the best publication available covering Software Defined Radios for the radio amateur and technically inclined radio hobbyist. Whether you are a neophyte just wanting to get into SDRs or someone with years of in-depth practical hands-on experience with using, building, and writing software for SDRs, you will find this volume extremely helpful, and very interesting. Roger W3SZ August 12, 2017