Rorin - The Books of Tanil, #3

Traveling to another world is not a simple or easy thing, as Aito or Luke Toft could tell you. So when a friend from the country of Tanil appears in their house one night in desperate need of help, they know something's wrong even before Luke is, accidentally or not, kidnapped. Knowing that the king of Tanil or his former adviser Cain will know what to do, Aito follows after her father and her friend with every intention of helping however she can.
Too bad things are never that easy, as Aito finds herself far from both Luke and the friends who could help her find him. Without Cain or Kyrios there to guide her this time, it's up to Aito to find her way across Tanil and figure out what is going on. Because while Cain and the king launch their own efforts to find the Tofts, all of them find that help may come from unexpected places - and not all friends can be trusted.
There's more than one person with plans for the Tofts, for Cain, and for Tanil itself, and the longer Aito spends here the more she realizes how little she knows about this world and its people or what she's capable of when friends and family are on the line.