John T Umhoefer

"After the commander of Skylab reports a massive circular structure in the snow-covered ground in the winter of 1974, two curious teens begin hunting for this elusive geological phenomenon on the Minnesota-Wisconsin border. They're unaware that they've stumbled upon a generations-old secret reluctantly revealed to the U.S. government and young geologist Lawrence Marten during World War II and defended with deadly violence. Paul Meadows is just fourteen...