Jewel Cave Adventure, The

Hardcover. Dust Jacket in very good condition. The Jewel Cave Adventure follows Herb and Jan Conn's remarkable journey mapping one of the world's most complex cave systems. Beginning with Jewel Cave's discovery around 1900, this book chronicles two decades of dedicated exploration that expanded the cave to over 50 miles of intricate underground passages. Featuring fifteen detailed maps—including a giant folded guide—readers navigate the three-dimensional maze as the Conns and their friends extended the cave mile by mile. Beyond the geology, Herb and Jan's eccentric personalities shine through: they built their stone house against a rock wall and supported themselves through guitar playing, lecturing, and rope work on Mount Rushmore. Their wild humor and quiet excitement bring underground wonders to life for readers who could never experience them firsthand. Published by Cave Books, 1981. First Edition, Signed