Although the main action of the novel mostly involves characters who are adults, the flashbacks to 20 years before tell a coming-of-age subplot about many those same characters. Although Ellie’s heavy drinking hints at something dark in the background (once again something that Falk himself doesn’t seem to fully realize), ultimately this is a nostalgic passage about the strength of childhood friendships and how they linger on in nostalgia even after they fade in real life.