S.I.G.M.A. 1: Web of Spies

When Ollie heads out for a run in the park, the last thing he expects to find is a dead body. But the real shock is that Ollie recognises the man. And somehow, he's connected to Ollie's father ... who vanished ten months ago.And then he learns that the dead man was a spy.With everything he thought he knew about his dad now in doubt, there's only one way for Ollie to get answers. He's going to have...