I have just discovered the author's website - with chapter excerpts - and am morbidly fascinated by all the decks slippery with blood, etc, etc.

Is it me or Napoleonic Wars-AUs are becoming increasingly popular these days? I really enjoyed Susanna Clarke, and now it appears that Naomi Novik is also immensely fascinating. But poor Buonaparte! All those wizards and dragons must be seriously damaging his mental health...