Top critical review
Starts off strong but with an unsatisfying end.
on November 5, 2017
The first half of the book was fascinating. An interesting blend of historical fact and fiction that jumped between present day (well, present-ish -- present as of when it was written), and World War II. The characters are interesting, the technical aspect of the cryptography was interesting (even if some of it went over my head, even with the diagrams), and I was engrossed with seeing where it went and how the past and present characters were linked.
However, the second half of the book was a disappointment. The plot changed focus, and entire plot points were dropped. Characters were suddenly shuffled around on the map and large time periods were skipped, making it feel like the author realized a bit too late that the characters weren't in the places he needed them to be for the finale. Some of the revelations felt farcical, the plot rushed, and the entire last third felt unsatisfying.