Roll up! Roll up! To the biggest Draw-Off event in the history of the Edinburgh International Book Festival, where superstar author-illustrators Rob Biddulph and Nadia Shireen go pencil to pencil in this hilarious interactive event. Come along to hear about their new books Gigantic and Grimwood: Monster Mayhem and get the chance to choose what both authors draw in the live-drawing showdown. Chaired by Pamela Butchart.

NB You will need to register before you can buy a ticket.