内容简介
TheMagicTreeHousetransportssJackandAnnietothefreezingArctic.There,theymustsolvethefinalriddletobecomemasterlibrarians.Butit'snotgoingtobeeasy--especiallywhentheyhavecrackingice,asealhunter,andaprodigiouspolarbeartodealwith.Willtheybeabletosolvetheriddlebeforetheygeticedthemselves?