Hunt Across Worlds — Sherwood Smith

CJ wrote up this adventure for her journal, though the M girls only come in at the end. It begins with two kids from Earth who discover a boy from another world being kept hostage. When they rescue him, they end up having to cross the USA before being blasted by magic to Mearsies Heili, where they meet a sailor girl who's been stuck in charge of a Mysterious Magical Object.

CJ and the gang try to come to the rescue, discovering that being on the edge of big events can lead to bigger questions... leading straight to the troubles chronicled in Fleeing Peace.