The Other Realm: Book Three of the Utgarda Trilogy (The Utgarda Series 3)

Having discovered the location of Brian Teplow, Russian anthropologist Anna Rykov, doctor Harry Lamb, and Father Sean O’Malley travel to a secluded asylum to collect him.  But things are not so simple, and Anna must travel to the land of Teplow’s imagination to rescue him, where she finds a different world from the one suggested in the Missing Medium’s journals.