One Good Turn
I'm starting to see why some readers complain about Atkinson's tricksy love of coincidence, though it isn't spoiling my enjoyment (yet). In the opening chapters we are presented with a mysterious man with a false name who is obviously up to no good; a beserk, murderous thug; a gentle writer of the aforementioned 'jolly' mystery novels, who lives in an imagined 'retro-utopia' of nostalgic England (I live there too); a Russian call-girl; and middle-aged, matter-of-fact Gloria who suspects that her husband is a crook.
Of course, events will slowly draw this disparate cast together, with the aid of Jackson, his actress girlfriend Julia (from Case Histories) and Detective Inspector Louise Monroe (who will return in When Will There Be Good News?), the threads pulling tighter and tighter until you're scared the plot will snap under the strain. But it doesn't -- not quite.
One more in this series to go. I'll definitely read it, but I might leave a longer gap this time.