The sleep garden

"In an underground apartment building called 'the 'Burrow--essentially purgatory--'twilight souls' inhabit the space between life and death. Interwoven with their stories are those of inhabitants of the living world: a retired sea captain, a psychotic former child actor (possibly the sea captain's illegitimate son?), and the technicians who monitor the Burrow, making sure its occupants have a constant supply of oxygen and food"--Amazon.com.