I think this was my favorite of the N.E. Bode trilogy. Fern receives an invitation and is compelled to visit the Underground City of the Anybodies beneath New York, dragging Howard along. Her fate is to battle the Blue Queen who is stealing the souls of books in order to rise back into power, a power that was not rightly hers to begin with. References to Narnia, Charlie and the Great Glass Elevator, and more, made this a fun read!