Alastair Humphreys spends four years cycling around the world... not just around, but London to South Africa via the middle east, the bottom tip of South America to Alaska, then, Russia, Japan, and through Central Asia and Europe before returning home.
The only detail missing in this book is "Why?" Although, I'm not sure even Alastair knows! The first book details the London to South Africa leg, with a large portion dedicated to various African nations. Alastair's writing, slightly patchy in early chapters, finds a rhythm by the second half of the book. There is plenty of detail on his see-sawing emotions, daily routines, strict budgeting, encounters with the locals and many humorous anecdotes. Alastair kept a diary throughout his journey and the level of detail is wonderful as a result.
The question of African poverty becomes more confusing as Alastair travels through Ethiopia and sees some of the negative aspects of aid and charity.
He saved 7000 pounds to undertake this journey and lived extremely cheaply. It is inspiring stuff.