Classic adventure for the modern reader!

What secrets lie in the depths of Bulgaria's mysterious Tsarichina Hole? Aliens? Demons? Treasure? It's up to Dane Maddock and Bones Bonebrake to solve one of the strangest mysteries of the Twentieth Century.

Dane and Bones have traveled to Sofia, Bulgaria to help their friend Max Riddle shoot a new documentary television show about the Tsarichina Hole, a shaft excavated by the Bulgarian military in the early 1990s, on the advice of a psychic remote viewer, and then abruptly sealed for no apparent reason.

Riddle has found a back door into the excavation, known to many as "Bulgaria's Area 51," and asks Dane and Bones to help him explore the passage to nowhere. Their discovery of a prized relic belonging to a famed Bulgarian conqueror touches off a search for an even greater treasure, and threatens to expose a secret that someone is willing to kill to preserve.