It's strange to see a TV character reading a book, since it's such a solitary activity. But do we really expect them to reference imaginary novels in conversations in their fictional universes? Sometimes there's a break in the narrative and the outside world comes into the story, alerting the viewer to the fact that both worlds can be fluid. This happens pretty frequently in Mad Men, where time-appropriate novels are read and discussed with bartenders, spouses, or in secret in the ladies' lounge.
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