Thule, The Nazi Atlantis, legendary home of Aryan super-beings who ruled pre-history. Thule was supposed to be a Nazi myth, but when a defector from the SS occult sciences division, the Karotechia, brings proof of Thule's reality, Delta Green's course is clear: the alien city and its technological and occult secrets must be denied to the enemy. But the true masters of Thule are fighting their own war. A traitor from the past endangers their eons-old plan to shape the future. The survival of mankind depends on the fate of Thule; but to destroy Thule or save it? Which choice will save mankind? Born of the federal government's 1928 raid on the degenerate coastal town of Innsmouth, Massachusetts, the covert agency know as Delta Green has battled abominations, alien sorcerers and blasphemous cults. As World War II rages, the SS Karotechia is calling upon the obscene powers of the Cthulhu Mythos to ensure a Nazi victory, meddling in powers they do not understand and cannot hope to control. Now the men and women of Delta Green will be tested to their limits to hold the apocalypse at bay. These are the glory days of Delta Green. It is also humanity's darkest hour. Book jacket.