I've read the entire series - not proud of it but we all have our guilty pastimes. This is, by my lights, the most self-indulgent of the lot and one where Jardine's weaknesses overwhelm his strengths. You'll find the sudden, inexplicable (but for plot movement) changes of behaviour that his characters are prone to, the unguessable (because the author won't show you all the cards) denouement, Skinner solving it all with a "Hmmm" and a long stare into the distance... all the hallmarks of a Jardine mystery. Those are the good bits. The bad, in my view, are the over-indulgence in horribly clumsy puns, clanking meta-textual excursions, and Jardine's belief that rim-shot-accompanied, blatantly telegraphed authorial interjections will be read as light comic touches. I'll buy the next one - they don't call it a bad habit for nothing - but I do hope he sticks more firmly to action, melodrama and his well-conceived version of the real Edinburgh in future.