At present (January 2011), the final (chronologically speaking) Frederick Troy novel does not disappoint. However, one could write two reviews; one as a pure crime novel, one as a novel depicting London in the 60s.
In the case of the former, it may disappoint many avid crime readers, as it is not until around page 300 (of a 550 page novel) that a crime becomes apparent. However, what the book lacks in pure detective fiction it makes up for in showing "swinging London" in the 60s. Readers of the earlier Troy novels know that our office has a taste for the ladies. This theme develops in this novel, with Troy being invited to a rather wild expereince out of town, where he learns he is not as liberal as he thinks! However, characters met at the party allow the story to evolve, and given time, as with the majority of the other novels in the series, it evolves into a wonderful piece of period detective writing.
Lawton states at the end, and it is fairly obvious from reading, the story is based around the infamous Christine Keeler affair, and whilst the book is "sex heavy", it is entertaining, and does keep you guessing until well towards the end, with different elements of principle characters personalities being revealed as one reads.