I should have had a good look at the back of the book before I bought it, but I'd just discovered Boris Akunin's hero, Erast Fandorin in [[Murder on the Leviathan]] and I was keen to read some more. Leviathan was the second book in the series and I was expecting Turkish Gambit, the third, to follow on where Leviathan had left off, but Turkish Gambit actually predates the events in the earlier book.