Small discrepancies in the historical record seem to indicate that the past has been affected, changing the outcome of the war. The belief that the past can be observed but never altered has always been at the core of time-travel theory - but it seems that the theory is tragically wrong. Meanwhile, in 2060 Oxford, the historians' supervisor, Mr Dunworthy, and seventeen-year-old Colin Templer, who nurses a powerful crush on Polly, are attempting the seemingly impossible feat of trying to find three missing needles in the haystack of history. This book is more than just the triumphant culmination of the adventure that began with Blackout. It is a clear-eyed celebration of faith, love, and the quiet, ordinary acts of heroism and sacrifice too often overlooked by history.

Sequel to "Blackout".

Winner of the 2011 Hugo Award for Science Fiction novel.
Winner of the 2010 Nebula Award for Science Fiction novel.