"Epidemiologists will find this a one source book of the different criteria for classification of AS, and of spondyloarthropathies in general. There are excellent tables showing the different treatment response criteria. Students of medicine and rheumatology alike will find the description of these criteria and their temporal updates particularly useful... We commend this book to general physicians and rheumatologists alike." --Nigil Haroon, MBBS, MD, DM,Fellow; Robert D. Inman, MD, FACP, FRCPC, Staff Rheumatologist, University of Health Network, Toronto Western Hospital, Professor, Department of Medicine, University of Toronto J Rheumatol 2010;37:8;doi:10.3899/jrheum.100171