内容简介
MorganleFaywillmakeJackandAnniemastersofthetreehouseifonlytheycansolvefourriddles—whichwilltakefourbooks,ofcourse!DolphinsatDaybreakbeginsthethirdsetoffourbooksinthismagical(andincreasinglypopular)series!JackandAnnieareoffintheMagicTreeHouseagain,thistimetoawholenewworldundertheocean.Completewithagiantoctopus,ahungryshark,anddolphinstotherescue,thisMagicTreeHousebookdeliversanunderwateradventurekidscandreamabout.