The field of underactive bladder is a poorly recognised yet important clinical condition, affecting up to a third of patients over 65. In this book, the authors look at the field of underactive bladder and its presentation, clinical diagnosis, potential etiopathogenesis and treatment. While the editors address a great deal of background information, they clearly identify that many limitations still exist to clinical diagnosis and urodynamic evaluation, and in particular a dearth of appropriate treatment options. This complex condition needs to be recognized and identified in the routine evaluation and clinical management of patients.