Fantastic novel, but horrendous cover design. Then you wonder why people think Noh masks are scary. I never thought an onnamen (female mask) was scary until I saw this! Luckily the Italian edition which I read ages ago has a more plain cover art. And by the way, onnamen is the original title, not just ‘masks’… Ah, now I see why they needed to add the creepy female mask picture.
The Noh Diaries 
Whenever I see Noh masks used like this, the word that comes into my mind is ‘abuse’. The novel is pretty good though…