Hippo started reading Slow Horses by Mick Herron
Slough House is Jackson Lamb's kingdom; a dumping ground for members of the intelligence service …
One of the few books of which I started watching the show first and only got onto the book later :P
(Unfortunately it's on my ereader at home, so I got to wait until I get back to finish it...unless I can pick up a hard copy of course!)