"Assam & Darjeeling" is the story of two children who set out to rescue their dead mother from the Underworld -- a nightmare place where the mythological desperately tries to keep pace with the world above. The children encounter cell-phone carrying demons, forgotten deities from defunct pantheons waiting tables, and one nasty character called Juniper who takes a particular, personal interest in their quest. In the fifteenth chapter of Book Four, the children make their way across the barren plain, reunited with their mother at last.