If you want the job, you have to kill the person currently holding it. Agent Seventeen is a hired gun, but he must kill his predecessor in order to assume the title the world’s greatest hitman. Agent Seventeen, the debut novel from author John Brownlow, is this week’s Book Club read.   John joins Richard and Judy to tell them about the differences between writing scripts for films – something he’s done prolifically – and writing a novel. With this in mind, he also explains how writing action and dialogue in particular differ between these mediums.   Simply head online to whsmith.co.uk to browse the Summer Book Club collection, and use the code APRIL10 for a 10% discount.