Katherine Heiny answers readers questions about Standard Deviation, her hilarious novel about marriage, parenting and the road not travelled. Audra is married to Graham, who is divorced from Elspeth. While Audra is sociable, loving, outspoken, tactless, kind and funny, Elspeth is contained, reserved, controlled and reticent. Despite loving Audra, Graham begins to wonder if his life should have taken a different path.

Upcoming recordings at BBC Broadcasting House, London

Wednesday 15 November at 1300 - Donal Ryan on The Spinning Heart

Wednesday 13 December at 1830 - Elly Griffiths is our guide to The Moonstone by Wilkie Collins

Email [email protected] to take part.