Bitter seeds - Ian Tregillis

The year is 1939. Raybould Marsh and other members of British Intelligence have gathered to watch a damaged reel of film in a darkened room. It appears to show German troops walking through walls, bursting into flames and hurling tanks into the air from afar.

If the British are to believe their eyes, a twisted Nazi scientist has been endowing German troops with unnatural, unstoppable powers. And Raybould will be forced to resort to dark methods to hold the impending invasion at bay.

But dealing with the occult exacts a price. And that price must be paid in blood.

Ian Tregillis' Bitter Seeds is a chilling masterpiece - a tale of a twentieth century like our own and also profoundly different.