It is common, even in the worst of books (of which this is the epitome) to find the author embarking on passages of purple prose. So you might find, for example, a passage like, "the town clung to hillside, a maze of streets darting through the mist".
On the other hand, even the most infantile writers remember that while their narrative can be as flowery as they like, in dialogue, people usually speak in a register which is representative of their class, situation and relationship to the listener. So you'd find: "Cor blimey, gov! You gave me right fright and no mistake", gasped the chimney sweep. "I say, sorry about that, old bean", replied Raffles, unperturbedly.
Colin Forbes is entirely unaware of this convention which has been in existence since Homer wrote the Iliad and puts his purple prose directly into the mouths of his characters. So we have bizarre exchanges like: "In that town which clings to the hillside, you will find in a maze of streets, the house of Joe Bloggs", said the village Bobby.
The effect is most disconcerting. Since none of the conversations are in the slightest convincing, you get the impression that the whole book is a wind-up and cannot take anything seriously thereafter.
One of the reasons I bought this book was that the blurb offered that much of the action takes place in Geneva and Annecy. Since I live in Geneva and visit Annecy frequently I was impressed by this and by the statement that the author likes to visit all his locations during research. After ploughing painfully through the relevant sections, I can only conclude that Mr Forbes visit to Geneva consisted of looking out of the window during a bus tour.
I could go on about wooden characters, silly boring story and implausible plot but I will summarise by saying that this book is utter drivel of the utmost drivellest sort.
I did not finish it and, in the end, I did something I have never done with a book before - I threw it in the bin.