Suggest me a book for “Thematic Parallel Reading” – a novel and a nonfiction pair!

I've recently gotten into a method I call "Thematic Parallel Reading", where you read a novel and a nonfiction book on the same theme at the same time. The fiction gives you the emotional narrative, and the nonfiction gives you the real-world context, making both experiences richer.

I'm looking for your suggestions for great fiction/nonfiction pairs! To give you an idea of what I mean, here are a few pairings I've read and enjoyed that illustrate the concept:

1. Modern Tech & Privacy:
   • Novel: The Circle by Dave Eggers
   • Nonfiction: Date Wisely by Nina Lakovic
   • Why it worked: The novel is a satirical tech dystopia about data and surveillance. The nonfiction book is a practical guide to navigating manipulation and data privacy in online dating. Together, they gave a full picture of a modern issue.
2. Classical Ambition & Power:
   • Novel: Macbeth by William Shakespeare
   • Nonfiction: I, Claudius by Robert Graves (historical fiction that reads like nonfiction) / The Prince by Machiavelli
   • Why it worked: The play is the ultimate story of corrupting ambition. Pairing it with a gritty historical account of Roman emperors or a classic treatise on power politics deepened the timeless themes.
3. Society & Human Nature:
   • Novel: Madame Bovary by Gustave Flaubert
   • Nonfiction: The Theory of the Leisure Class by Thorstein Veblen
   • Why it worked: The novel is a masterpiece of character-driven social critique. The economics book analyzes "conspicuous consumption." Reading them together framed personal tragedy within a powerful sociological lens.

I'm now looking for my next parallel read! Suggest me a book pair (one fiction, one nonfiction) that you think work brilliantly together on a shared theme. I'm open to any theme: historical, scientific, philosophical, or modern. What's a pairing that you've found enlightening?