By Ben East

Invisible Lines: Boundaries and Belts That Define the World Maxim Samson Profile Books, £22, pp416 In his debut book, geographer Maxim Samson explores 30 unseen boundaries, from the international date line to the Sargasso Sea – all key to understanding political, social, economic and natural orders. Samson, a professor at DePaul University in Chicago, has an entertaining approach and this is a chance to see the world anew through the eyes of a wonderfully curious new writer.