There is also Mike Horn [1]. He has written several books about his expeditions.
Lattitude Zero: "In 1999, Mike set off on an 18-month voyage to circle the equator on foot and by sailing.
Conquering the Impossible: "In 2002-04, Mike went around the world on the Arctic Circle solo in an expedition dubbed "Arktos". It was a solitary voyage of two years and three months without motorised transport (boat, kayak, ski kite and on foot) on a 20,000 kilometres (12,000 mi) odyssey."