Robert W. “Bob” Audretsch retired as a National Park Service ranger at Grand Canyon in 2009 after nearly 20 years of service. Since then, he has devoted himself full time to research and writing about the Civilian Conservations Corps (CCC). Bob grew up in Detroit, Michigan, and attended Wayne State University where he received a BA in history and a MS in library science. Prior to his work as a ranger, he was a librarian in Michigan, Ohio, and Colorado. Bob has a lifelong interest in history, nature, books, and art and has written numerous publications in the fields of library science, sports, and history. Bob is the author of Grand Canyon’s Phantom Ranch (Arcadia Publishing, 2012), Shaping the Park and Saving the Boys: The Civilian Conservation Corps at Grand Canyon, 1933–1942 (Dog Ear Publishing, 2011), We Still Walk in Their Footprint: The Civilian Conservation Corps in Northern Arizona, 1933-1942 (Dog Ear Publishing, 2013), Selected Grand Canyon Area Hiking Routes, Including the Little Colorado River and Great Thumb (Dog Ear Publishing, June, 2014) and, with Sharon Hunt, The Civilian Conservation Corps in Arizona (Images of America) (Arcadia Publishing). He resides in Lakewood, Colorado.