GPR = an MRI for underground areas. This book provides a good foundation to understand the use of GPR (ground penetration radar) technology to map subsurface features on golf courses and sports facilities and assess in 3D conditions impacting the playing surface. The authors explain in plain language the advantages and cost effectiveness of GPR to improve the performance of greens and sports fields. It is aimed at turf professionals and sport facility managers, although laypersons can also appreciate the diagnostic benefits by viewing numerous screen shots from actual surveys. =When turf knowledge and surface remediation have been exhausted - this is the book for you!