The "Water Operator Certification Exam Prep" by AWWA is a trade paperback test book published in 2018. It is designed for adult education and further education levels, focusing on the subject area of water system operations. Authored by the American Water Works Association, this book is targeted towards individuals seeking certification in water system operations. With an intermediate to advanced level of content, this publication provides the necessary information and preparation for those looking to pass their certification exam in this specialized field.