After Kon-Tiki
River of Doubt by Candice Millard
Kon-Tiki hooked you with that salt-spray gamble against nature's veto power—men on a raft defying ocean and skeptics alike. River of Doubt strips that same raw endurance down to Amazonian rapids and jungle predators circling Roosevelt's post-presidential plunge into uncharted Brazil, where presidential résumés mean nothing and survival is earned one fever-racked mile at a time.