SIOUX FALLS, S.D. – The University of Iowa has struck gold. Not the kind that lies in the federal reserve, but one of paper in a Sioux Falls man’s basement. After 20 years of collecting, he is donating his one-of-a-kind collection of 17,500 books worth an estimated three quarters of a million dollars. READ MORE: Sioux Falls Man Donates Collection Of Nearly 18,000 Books | KDLT.com South Dakota News