I found River of Darkness to be a reasonable read and picked up Blood Dimmed Tide in a second hand book store for some holiday reading. It's very much the same style and suffers from the same weaknesses. The plot is quite engaging and well paced - at a period between the World Wars, the similarity in the murders of some school girls starts off a hunt for a serial killer. The trail of detection is interesting, involving Scotland Yard, Home Office, police and retired detective John Madden who gets involved when he helps discover one of the bodies. The eventual resolution is rather telegraphed and fails to maintain the menace or tension that it should. Much of this is down to Airth's writing style which is flat and rather old fashioned. While this works at times, it makes much of the dialogue stiff, stilted, humourless and unconvincing. Even close friends and working class characters talk in clipped, formal lines. The characters are too one dimensional, Boy's Own, black and white creations - as if before WW2 people were naive, innocent and sexless. It doesn't help that Airth's hero Madden himself, although marginalised during most of the action, is a bit wet. References are made to the rise of Nazism in Germany with the implication even in 1932 that the British authorities and even citizens like Madden were already predicting WW2. Without wishing to spoil the enjoyment of future readers - this makes Airth's choice of villain rather interesting. I won't rush to read the final chapter of the trilogy ... but you never know.