So, season six of Slow Horses has finished. You’ve binged the other five. You’ve read the entire Slough House series by Mick Herron, which the show is based on. Where next?

Well, we asked our resident espionage experts to list the best spy series that have some of that Slow Horses vibe – you know, clever contemporary espionage with a bit of humour, outsider protagonists and a cynical eye on the whole spying thing. They did so in this article, and we’ve also put together a video guide that features all seen series.

Now, we’re giving you the chance to win the first book in each set. Authors include David McCloskey, William Boyd, David Goodman, Mark Ezra, Tess Gerritsen, Alex Preston and Michael Idov.

So, watch our little production and then head over to our online entry form and see if you’ve found the cryptic clue which is in the video.

Good luck. We’ll close entries at noon GMT on 4 November.