Explore how setting the book in New York City allowed Mass to challenge Jeremy and Lizzy both physically and emotionally. What aspects of the city are integral to the plot and character development?

Jeremy and Lizzy learn important lessons from the people they make deliveries to. What essential wisdom does each character bring to Jeremy and Lizzy, and how does each move the kids along on their journey?

Explore how Jeremy and Lizzy’s journey through searching for the keys and delivering the objects challenges and supports their friendship. What does their journey say about how friendships last or fall apart? Choose three individual experiences (such as the flea market or one of the deliveries) and illustrate how and why each influences their friendship.