This is the fourth book in the Shadows of the Apt series. I got it as a Christmas present, so I haven't had to approach my bank manager yet.
   I think this is the best of the series so far. And I'm intrigued to know what happens in the remaining six (!) books, as so many doors have been closed in this one. (Although I shall be finding out soon enough, as I also got the next in the series for Christmas. Shout out for Father Christmas.)
   I found two editorial-type errors in this book (you can see what they were by going to Cashmore Editorial over on the right, and navigating to the Errata page) and I bragged about it on Twitter. Adrian Tchaikovsky responded to say 'only tw? I'll take that' and I guess he has a point.
   Anyway, Salute the Dark   is a worthy addition to the series, and I recommend it.