The kidney involvement in monoclonal gammopathies is a fascinating field of research and of great concern to clinical practice. The book is divided into four parts. The first one is devoted to the culprits and includes contributions from leading investigators in B-cell proliferations, immunoglobulin synthesis, secretion and structure, light chain uptake and metabolism in the kidney. The second and third parts are devoted to the victims : the tubule and the glomerulus. New insights into pathophysiology, clinical and histological features, treatment of renal lesions and therapy of B-cell proliferations are reported in myeloma cast nephropathy, Fanconi’s syndrome, Randall-type monoclonal immunoglobulin deposition disease and non amyloid organized monoclonal immunoglobulin deposits. In the last part, immunoglobulinic amyloidosis is considered with a round table devoted to stem cell transplantation and new promising therapies in AL amyloidosis.