Death Warrant

On a deserted jungle moon, Rogue Trader Anjelika Trayn and her expedition unearth a legion of deathless horrors. The arrival of a squad of Space Marines seems like salvation, but the strange grey-clad killers may yet prove more deadly for Trayn than the ancient civilisation she has awoken. Read it because
It's another tale of the sinister Carcharodons from the author of 'Red Tithe', and it brings the grey-armoured killers up against an interesting foe.