"Tarzan and the Lion Man" (Tarzan #17) by Edgar Rice Burroughs

Like the great hunting beast that he is, Tarzan tracks the strangest safari Africa has ever seen: ten-ton trucks, cameras, tents, hundreds of porters, hunters, workmen - an endless snake coiling through his beloved jungle. Until they come to Bansuto country and the silent poisoned arrows of that savage tribe throw all the panoply of civilization into helpless panic!