内容简介
SumnoandDuffypugg(brothers)aretoldtheymusttraveltoavolcanicislandtohelpanaunttheyhavenevermet.Whentheyarriveontheisland,theysoondiscoverthattheirmysteriousauntieisuptonogood.Theyaresentonanexpeditionthattakethemonawildboatridestraightintoanerruptingvolcano.Facingextremedanger,theyhikeinsidethevolcanoandeventuallyescape--afterSumnosavesDuffy'slife.Hereisanactionadventurethatwillimmidatelyhookyoungreaders.