Mick Herron answers readers' questions about his novel, Slow Horses, the first in his hugely popular Slough House series. In it we meet the 'Slow Horses’ for the first time; failed spies who instead of being pensioned off, find themselves working in Slough House, near the Barbican in London. Here, they carry out menial administrative tasks of little or no importance, led by their offensive, vulgar boss Jackson Lamb. In this novel, the Slow Horses find themselves unexpectedly at the centre of the action. Our next recordings: Thursday 17th August: Denise Mina on her novel The Long Drop. 7pm at The Portobello Bookshop, Portobello, Edinburgh. (Free tickets are available via the Bookshop's website) At BBC Broadcasting House, London: Thursday 21 September at 1300 - Bernardine Evaristo on Mr Loverman Thursday 12 October at 1200 noon - Katherine Heiny on Standard Deviation. Email [email protected] to take part