Nazi supermen vs. British warlocks in a do-over to save the world.

Tor, 2013, 384 pages
( Let's do World War II again, because it was so much fun the first time! )
Verdict: Necessary Evil brings the Milkweed trilogy to a finale, so definitely do not read it out of order. The ending suffers only from a bit of deja vu thanks to the events of the first book being replayed and altered, but it's a satisfying conclusion to a great series.
Also by Ian Tregillis: My reviews of Bitter Seeds and The Coldest War.
My complete list of book reviews.

Tor, 2013, 384 pages
May 12, 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 of the supermen that were created by the Nazi war machine and caused the specters from outer space to notice our planet in the first place.
His biggest challenge is the mad seer Greta, one of the most powerful of the Nazi creations, who has sent a version of herself to this timeline to thwart Marsh. Why would she stand in his way? Because she has seen that in all the timelines she dies and she is determined to stop that from happening, even if it means destroying most of humanity in the process. And Marsh is the only man who can stop her.
Necessary Evil is the stunning conclusion to Ian Tregillis' Milkweed series.
( Let's do World War II again, because it was so much fun the first time! )
Verdict: Necessary Evil brings the Milkweed trilogy to a finale, so definitely do not read it out of order. The ending suffers only from a bit of deja vu thanks to the events of the first book being replayed and altered, but it's a satisfying conclusion to a great series.
Also by Ian Tregillis: My reviews of Bitter Seeds and The Coldest War.
My complete list of book reviews.