Excellent.

An excellent book ...

A prerequisite for finding our way through any story or novel is to be lost: the journey can’t begin until we’ve been set down in a place somehow unfamiliar.  As readers, we are content, even delighted, to be lost, in the sense that we are both absorbed and uncertain of where we are or where we are going, as long as we feel confident we are following a guide who has not only the destination but our route to it clearly in mind.

Peter Turchi, from Maps of the Imagination: The Writer as Cartographer