of the first verified walk around the world (Dave Kunst, 1970-1974, 14,452 miles (23,123 km)) but around (or slightly under) half the distance of the first verified run around the world, when Garside's run was eventually verified by Guinness in 2007 (Robert Garside, 1997-2003, estimated 30,000 - 40,000 miles (48,000 - 64,000 km)) During most of the run, Olsen pushed a baby carriage, in which he kept food, beverages, a tent, and other equipment. While running through Russia and half of the U.S., he was aided by a support car transporting these supplies. From London to central Siberia he was accompanied by Alexander Korotkov of Russia, who planned to run around the world with Olsen but gave up in central Siberia. In October 2006, Jorden Rundt i Løb ("World Run" in English) was published. World Run II Olsen and Sarah Barnett ran the North-South route starting on 1 July 2008. The North-South run aimed to complete a distance of with GPS tracking and live coverage, thus making it the world's longest fully GPS-documented run. The run went from top to bottom of the globe and back, running across four continents and a huge range of temperatures and terrain. It can be seen as a run in a circle around the world in southern, later northern direction with the poles excluded. It started at North Cape, Norway (1 July 2008) passing Helsinki, Finland (4 August), Copenhagen, Denmark (25 August), Budapest, Hungary (25 September), and Istanbul, Turkey (5 November). On December 1, 2008, near Silifke, Turkey, Barnett had to give up after , and Olsen continued alone. He passed Cairo, Egypt (1 January 2009) and Addis Abeba, Ethiopia (16 April). Cape Town in South Africa was reached by 15 March 2010, thereby completing the first half of the run and the first documented run through Africa, a distance of . Olsen spent more than six months recovering in Denmark due to dysenteria, malaria, and two operations to eliminate deep infections in his right arm. He then continued his run on 1 January 2011 from Punta Arenas for the last half of the run, through South America and North America to Newfoundland . On 28 July 2012, Olsen announced on his website the completion of World Run 2 in Cape Spear, Newfoundland. Books In June 2014, Olsen's book "The Runner’s Guide to the Planet" was released on iTunes. Olsen also has two other