In the autumn of 1988, Michael Palin set out from the Reform Club with an ambitious plan: to circumnavigate the world, following the route taken by Jules Verne's fictional hero Phileas Fogg 115 years earlier. The rules were simple. He had to make the journey in 80 days using only forms of transport that would have been available to Fogg.

In his most challenging journey to date, Palin tackles the Himalayas, the greatest mountain range on earth. It is a virtually unbroken wall of rock stretching 1,800 miles from the borders of Afghanistan to south-west China. Penetrated but never conquered, it remains the world's most majestic natural barrier, a magnificent wilderness that shapes the history and politics of Asia to this day.

In March 2022, Michael Palin travelled the length of the River Tigris through Iraq to get a sense of what life is like in a region of the world that once formed the cradle of civilisation, but that in recent times has witnessed turmoil and appalling bloodshed. It was a journey of sharp, often brutal contrasts. At one moment he would be exploring the old streets of Baghdad or the ancient ruins of Babylon. At the next he would be visiting the war-torn city of Mosul, or learning about the horrific Speicher massacre in Tikrit.

Michael Palin journeys to a vast country of unimaginable contrasts - Brazil. An economic powerhouse, it is host to a staggering variety of peoples. He starts his journey in the north, in the remote mountains and forests on the border with Venezuela, and finishes in the south at the legendary Iguaçu Falls. He travels by river-boat, float-plane and foot to visit tribes deep in the jungle, samples life in the agricultural and mining heartland of Brazil, experiences the modernism of Brasília and the heady mix of Rio de Janeiro, and ventures into the favelas.

Journeys to Impossible Places continues the story Simon started in his phenomenal Sunday Times best seller Step by Step, which traced the first decades of his life from depressed and unemployed teenager through to his early TV programmes. Now Simon takes us on the epic and thrilling adventures that followed, in beautiful, tricky and downright dangerous corners of the world, as he travelled through the Tropics, to remote paradise islands, jungles dripping with heat and life and on nerve-wracking secret missions.