Harrison, Harry: Planet of the Damned. v1. 21 Jun 07
72 HOURS IN HELL
Dis was a harsh, inhospitable, dangerous place and the Magter made it worse. They might have been human once—but they were something else now. The Magter had only one desire—Kill! Kill everything, themselves, their planet, the universe if they could—
Brion Brandd was sent in at the eleventh hour. His mission was to save Dis, but it looked as though he was going to preside over its annihilation.
Note: There was some rather wierd formatting in parts of this book. I've tried my best to make it readable, and reproduce something like the way it was in the original, but it's far from perfect.