I really enjoyed the twists and turns and suspense of this third book in the series. I liked it much better than the second one. Her books contain many references to historical figures and events that are real, and I like that very much. This one has passing reference to Gertrude Bell (for more on her read Desert Queen: the extraordinary life of Gertrude Bell) and the political environment in Austria just before WWI. Very nice to have the historical reference in addition to a great mystery.