The Greatest Adventure (The Greatest Adventure #5)

Does this spell the end of the Venture? As the crew races to Barsoom, a volley of explosive fire from a tribe of green Martians - the Warhoons - sinks the once proud-airship down to earth! But Tarzan isn't fazed - he has a plan (and with a certain local's assistance) they might yet save the galaxy from the villainous Rokoff... assuming, of course, they can survive that long!