Tilly never gives up hoping for a special Christmas, and in spite of her mother's meager earnings and an unforeseen illness, Tilly's Christmas is a magical one because of her neighbor's glass angels.
Even though times are hard, Tilly looks forward to spending Christmas with her mother in their small attic apartment, until illness and an accident threaten her plans
Describes the Biosphere 2 project which has created a closed environment intended to duplicate life on Earth in a way that would facilitate future space colonies