Within These Walls (Sister Agentha #3)

When the tomb of a daemon is discovered on the agriworld of Niebuhr, Sister Agentha of the Orders Dialogus is sent to decipher the markings on the structure. Guarding her are Space Marines of the Exorcists Chapter, whose affinity for all things daemonic is well known... and feared. But as Agentha translates the ancient script, she realises a terrible the daemon is gone. Where is it? And will any of them survive its wrath? Read it because
Sister Agentha returns! After surviving a space battle alongside the Black Templars and an encounter with the spectral Legion of the Damned, her latest adventure sees her deciphering an inscription on an ancient tomb. It might not sound exciting, but the tomb is that of an ancient daemon. Oh, and it appears to be empty... Sounds like danger is in store. Just as well the Space Marines of the Exorcists are there to help...