There's some violence towards the end, but the mood of The Immaculate Deception is light-hearted — it's not an outright comedy, but Pears' satire is gentle but effective and he doesn't take himself too seriously. The plot has more than enough twists and turns to keep us curious, without becoming too implausible or complex, and the characters are convincingly human, never reduced to farce or formula. The sordid corruption of Italian politics and the feuds and contrivances of the art world make for a dramatic backdrop.
The Immaculate Deception is the seventh novel featuring Flavia di Stefano and Jonathan Argyll — and perhaps, given its conclusion, the last. I'll definitely be keeping an eye out for the earlier volumes.