The textbook "Sharing RF Spectrum with Commodity Wireless Technologies" offers a comprehensive analysis of the challenges and opportunities in the field of frequency usage for wireless technologies. In light of growing concerns about the scarcity of frequency spectrum that could jeopardize the growth of wireless technologies and services, the book highlights the responses of regulatory authorities worldwide aimed at freeing up more spectrum for unlicensed or shared use. It addresses the significance of the frequencies released by the transition to digital television and their potential application in areas such as the Smart Grid. The book also discusses the challenges of implementing frequency sharing, particularly regarding RLAN/radar spectrum sharing in the 5GHz band, and emphasizes the need for both theoretical and practical advancements in this area.