David Brown was the ultimate traveller. His outlook was shaped by the places many of us wouldn't dare to visit. From Belarus to Rwanda, Damascus to Transnistria and the Syrian city of Palmyra before the siege of ISIS. David died prematurely in 2015 in Helsinki, but his travel writing from the 100-plus countries he had been to has been collected of the by his brother Neil Brown in a book called Hellholes of the World. Neil Brown explains how he has now been inspired by his brother to travel.