Show HN: I built a system that detects book mentions across 2k podcast episodes (mavensignal.com)

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A quick early data point: the most-mentioned books across the initial 19 podcasts over the last year were:

1. Made In America - Sam Walton (18 episodes across 3 podcasts)

2. 7 Powers - Hamilton Helmer (15 episodes across 3 podcasts)

3. Zero to One - Peter Thiel (10 episodes across 4 podcasts)

4. Against the Odds - James Dyson (9 episodes across 2 podcasts)

5. Harry Potter - J.K. Rowling (8 episodes across 5 podcasts)