People in glass houses

"His name is Joshua Knight. Once a respected explorer, the press now calls him the Tarnished Knight. He took the fall for a disaster in the Underworld that destroyed his career. The devastating event occurred in the newly discovered sector known as Glass House-a maze of crystal that is rumored to conceal powerful Alien antiquities. The rest of the Hollister Expedition team disappeared and are presumed dead. Whatever happened down in the tunnels s...