Bart Lasker and his master have unearthed a mysterious tunnel that might lead them to the underground world of Shambala, where a prehuman race houses the power source of the vicious Bonpo enemy. But as they hit the road, the two are stalked by the evil treachery of the Bonpo wizards!

Cave of the Master 1990, Pinnacle Books

ISBN-13: 9781558173071

Mass-market paperback

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