The regular pumping sound and motion of a center pivot irrigation system is the heartbeat of many successful farming operations - yet this technology remains a mystery to millions. Flying over agricultural regions, many airline passengers look down with curiosity on the circles of green with no understanding that what they are seeing is their food supply in production. "Rainmakers: A Photographic Story of Center Pivots" takes us on a journey that explains how center pivot irrigation contributes to the food on which we depend. This important story is presented through instructive and beautiful photographs that make the book a visual delight for even the casual reader. The goal of "Rainmakers" is to convey the history and complexity of center pivots and how such technology has become an integral part of nourishing our world. "Rainmakers" includes a foreword by Nebraska Congressman Tom Osborne, an essay by David Howe, an epilogue by Susan Seacrest, and captivating images taken by both professional and amateur photographers. The Groundwater Foundation is an internationally known nonprofit organization that educates the public about the nature and value of groundwater. The Foundation has published numerous books such as "Making Waves: How to Put on a Water Festival" and sponsors the Groundwater Guardian program that recognizes communities taking steps to protect groundwater locally.