At the age of fifty-five, former president Theodore Roosevelt took part in an expedition to the far reaches of the Amazon. Mind you, in time and context this was an extraordinary thing; at this point in history, you'd need to make an expedition into space to get as far away from workaday life as Roosevelt's party went. This book is Roosevelt's journal during the expedition into the unknown in the name of science -- an expedition into very real and very mortal peril. . . .