The field of gastrointestinal motility disorders has been expanding in recent times largely due to advances in diagnostic modalities. This coupled with new evidence to support best practices has increased the interest among clinical gastroenterologists, researchers, teachers and trainees.New advancesin the field of evaluation of functional bowel diseases and motility disorders, such as high-resolution manometry, 24-h pH impedance monitoring, Bravo capsule pH-metry, barostat, balloon expulsion test, barium and MR defecography, biofeedback, hydrogen breath tests, motility capsule (smartpill) etc. have significantly expanded the scope and outcome of treating such these disorders. However, presently there is nocomprehensiveguidethat coversall aspects of evaluation of GI motility.This contributed volumewill havechapters written by a panel of experts from the global academia, including from India, Singapore, Japan, Taiwan, Thailand, Europe and USA, integrating the body of knowledge on evaluation methods with evidence of best practices for the management of motility disorders. A chapter on how to set-up a manometry laboratory provides key information for clinicians and researchers who are planning to start working in this area. With 20 chapters in the book supported with numerous tables, flow charts, schematic diagrams and images, professionals will find it an essential reading.