By Drier & DuTemple, 1961 Over the years, the book went through several printings, eventually selling 5000 copies and becoming something of a cult classic. In 2004, an original copy sold on e-Bay for $150. This current printing is a response to all the requests our family has received to re-issue the book. It is an exact duplicate of the original 1961 edition, including typographical errors and original photographs. In the years since this book was published, there has been in the field scientific advances which are not included in this work. Prehistoric Copper Mining in the Lake Superior Region is now available again in its original format. Soft cover, 5×8, illustrated, with 222 pgs.