Dragon Slayers - Paul Farrell

Finnlay, Rudi and Harrison are three ordinary boys, living in a farmhouse with their parents and grandparents. When they encounter a soul imprisoned in stone by the witch who lives in the woods, their lives abruptly become far more interesting, and far more dangerous. If they can defeat the witch and her protectors, the stone will become human again. But the threat may be greater than they know, and only their bond as brothers can save them.