{"ok":true,"subgenre_id":"historical_fiction.twentieth_century","heat":{"n":9002,"distribution":[{"pct":95,"heat_level":"steamy"},{"pct":3,"heat_level":"sweet"},{"pct":1,"heat_level":"dark"},{"pct":0,"heat_level":"explicit"},{"pct":0,"heat_level":"spicy"}],"steamy_or_hotter_pct":96},"display_name":"20th Century (incl. WWII)","greenlight":{"score":80,"band":"Strong-buy","reason":"Strong unmet demand. Big earnings in this lane (chart-toppers up to ~$125,104/mo at $11.99).","confidence":"bankable"},"economics":{"top_title_monthly_usd":125104,"typical_price_usd":11.99,"kindle_unlimited_pct":37,"avg_page_length":null,"demand_30d":7406},"opportunity":{"score":47,"label":"moderate opportunity","rank":28,"of":43,"demand_pctl":0.38,"revenue_pctl":0.69,"scarcity_pctl":0.64,"momentum_pctl":0},"length":{"trend":{"direction":"shorter","older_novella_pct":0,"older_median_pages":442,"recent_novella_pct":0,"recent_median_pages":360},"format":{"kindle_median_pages":349,"overall_median_pages":360},"series":{"dominant_shape":"Standalone","shape_distribution":[{"pct":100,"shape":"Standalone","median_pages":360},{"pct":0,"shape":"6-9 books","median_pages":362}]},"n_books":736,"p25_pages":310,"p25_words":85000,"p75_pages":406,"p75_words":112000,"sufficient":true,"novella_pct":3,"subgenre_id":"historical_fiction.twentieth_century","median_pages":360,"median_words":99000}}