From 2013 James has released a Jed Walker suspense thriller each year, of which the world's fastest selling thriller author Lee Child has said: "Jed Walker is right there in Reacher’s rear-view mirror." . The Spy dealt with the dangers of "private spy" outsourcing per Edward Snowden, The Hunted was about finding WMD in Iraq, Kill Switch was about government contingency plans to shut down the internet in event of catastrophe, and Dark Heart is about refuges and border control. James has revealed that he has signed on to do a world-wide release of Jed Walker book 5, which will be a prequel going back to the days when Walker was first entering the CIA.