BK19 Underground Treausures of the Black Hills by Bruce A. Raisch.  This book is a compilation of the various show caves, tour mines and select museums in the Black Hills area.  Divided into six sections including show caves, closed show caves, the Mammoth Site, tour mines, museums about dinosaurs or mining and the hot springs of Evans Plunge.  The author personally visited all sites and provides location, contact information, facilities, nearby attractions and some history.  The book is written in first person and includes personal adventures of the author making it an excellent travel guide.