87th Precinct vs The Three Investigators
Two crime fiction series side by side, straight from the catalog data: 87th Precinct is the longer series (43 books vs 37 books); The Three Investigators is the more recent one, starting in 1964. There's no wrong answer — pick the shape that fits your reading appetite, and Shelfmark will keep your place in either (no account needed).
| Statistic | 87th Precinct | The Three Investigators |
|---|---|---|
| Author | Evan Hunter | Michael Collins |
| Books | 43 | 37 |
| Published | 1956–2005 | 1964–1979 |
| Books per year | 0.9 | 2.5 |
| Start with | Cop Hater (1956) | The Secret of Terror Castle (1964) |
| Reading order | Full 87th Precinct order → | Full The Three Investigators order → |
Numbers come from the Shelfmark catalog (Wikidata + Open Library). "Books per year" is catalogued books divided by the publication span — a rough cadence, not a quality score.