For this instalment of the series, we are back in New York with Harrison 'Harry' Fearing Pell and John Weston, who bear a similarity to Sherlock Holmes and Doctor Watson in more ways than one, as does the general feel and style of the story, which is no bad thing in my opinion. 

These are wonderfully written characters that are bursting with personality and that complement each other perfectly, with plenty of witty dialogue and humour between them. 

The plot is well-paced and contains plenty of mystery, intrigue, suspense, emotion and humour as well as a fair amount of action as we follow Harry and John as they deal with the cases assigned to them by the SPR. 

In my opinion, this is the best book in the series yet, which as they have all been excellent, is not an easy thing to achieve.