Tregillis, Ian.
Summary: "12 May 1940. Westminster, London, England: the early days of World War II. Again. Raybould Marsh, one of "our" Britain's best spies, has travelled to another Earth in a desperate attempt to save at least one timeline from the Cthulhu-like monsters who have been observing our species from space and have already destroyed Marsh's timeline. In order to accomplish this, he must remove all traces...
Format: text
Publisher / Publication Date: Tor 2013