What is "petrogypsies"

Petrogypsies is a critically acclaimed science fiction novel by Rory Harper that has achieved cult status among science fiction fans in the Texas/Oklahoma oilfields. It incorporates a short story that was published in 1985 in Far Frontiers, vol 2. The novel's plot focuses on a group of oilfield workers in an alternate Texas who use giant, semi-sentient, worm-like creatures—possibly of extraterrestrial origin—to drill their wells, and on Sprocket, the team's amazing drilling beast.

DarkStar Books and Rory Harper plan to continue the series in two new books, Sprocket Goes International and Sprocket Goes interstellar.