Books in the Explorers series

Something deadly is stalking Patrick and his friends.Patrick Morrison and his friends want one more great adventure before summer is over and they begin their sophomore year in high school. One of them gets a liquid-fuel rocket so they set out to launch it. The rocket takes off as planned, but comes down on a far-off hill covered with trees and brush.A search for the lost rocket leads them to explore the hill but they get more than they bargained for. Patrick uncovers a tombstone-then more! They've stumbled upon an old abandoned graveyard. The inscription on one of the stones brings forth the story of a giant, renegade Indian who was said to kill trespassers on his land. Patrick doesn't believe in ghosts, but when a strange phantom runs toward him and then vanishes before his eyes, he realizes they are all in real danger. Could the ghost of the legendary Fury be real? And who will be his next victims?