After years of mental illness Guy Stagg embarked on a walk from Canterbury to Jerusalem, spending  ten months on a 5,500 km medieval pilgrim route, a journey to the centre of the three Abrahamic faiths. And all this despite having no faith or belief in God.

He joins Mark Dowd in Canterbury, retracing the footsteps of where it all began, to discuss why as a non-believer, he hoped the extraordinary adventure would heal him.

For Things Unseen he reflects on the rollercoaster highs and lows of travelling alone and without support, near death experiences, the extraordinary characters he met along the way, and the landscapes he encountered. Guy offers a unique and meditative insight into contemporary faith that lays bare his struggle to escape the past and walk towards recovery.

Guy’s book – The Crossway – is published by Picador