'This is the fourth book in the series about the Land Behind the World. In the first book Bara, Dov and Eris come into conflict with the soulless Flugs of Grey City and in subsequent books the struggle between life and the deathly influence of the Grey Folk continues. Now, in The Crown of Light, Bara and her two friends join forces again in an exciting culmination of the story begun in the Land Behind the World.'
Source: Publisher's blurb (2010 ed.)