Deadly Mystery of the Missing Diamonds

Easy read, I've enjoyed it mostly because of the setting (London, the '20s, jazz) and the language (I certainly learned a lot of words that looked like britishisms and now outdated jargon, though not being a native speaker I cannot attest to these statements), but the plot is very predictable and easy, to the point of being naive for a crime novel. However, worth the read if you like a nice story set in the past. Credit goes to the author for bringing you (quite literally) around London with the characters, describing roads and places.