Fresh out of university, life-long friends Charles Guilhamon and Gabriel de Lapinau set off from Paris on a gap-year adventure around the world. After months of preparation, they left with only their bikes, limited supplies and one to three euros of spending money per day.

In Cycling out of the Comfort Zone, Charles retraces their journey through the remote parts of the world, visiting minority and persecuted Catholic communities on four continents, including the currently war-torn areas of Syria and norther Iraq.

Combining fast-paced story-telling with accounts of deeply moving encounters with Christians who experience daily what it means to suffer and face death for their faith, this vivid book is also a spiritual biography of how the boy's own belief were strengthened along the way.