Mary Ruth Cook, 85 of Erin, TN. passed away Monday August 3, 2015 at Skyline Medical Center. No services are planned at this time. She was born July 30, 1930 in Lafayette, Tn. daughter of the late James and Martha Gray Wilder. She was preceded in death by her parents and her husband Edward Cook. Survivors include four brothers Paul Wilder, Richard Wilder, Robert Wilder, Marshall Wilder, one sister Joy and one special friend Mary Jean Reynolds.