Pentagon officials decided to give the book another read, after a member of the Navy SEAL team that killed Osama bin Laden released an account of the raid without submitting the manuscript for a security review.
While the plot may recall other allegorical crossings (such as the one that the Knight, the Squire and the circus family undertake in Ingmar Bergman's film "The Seventh Seal"), the power of Blackburn's book lies in her language and in her ability to conjure images that are at once spooky and heart-rending.