Callsign: King II - Underworld: King II - Underworld: King - Book 2 - Underworld (a Jack Sigler - Chess Team Novella)

Strange things have always happened in the Superstition Mountains of Arizona... Bizarre lights, reports of cave entrances that appear and then vanish, hundreds of mysterious disappearances...and rumors of monstrous creatures that inhabit a labyrinthine underworld. When a terrifying accident on an Arizona highway leads to a military exclusion zone and a cover-up of staggering proportions, Jack Sigler-Callsign: King, field leader of the elite and ultra-secret covert Chess Team-joined by his c...