Bourne vs The NUMA Files
Two thriller series side by side, straight from the catalog data: The NUMA Files is the longer series (15 books vs 14 books); The NUMA Files is the more recent one, starting in 1999. 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 | Bourne | The NUMA Files |
|---|---|---|
| Author | Robert Ludlum | Clive Cussler |
| Books | 14 | 15 |
| Published | 1980–2017 | 1999–2017 |
| Books per year | 0.4 | 0.8 |
| Start with | The Bourne Identity (1980) | Serpent (1999) |
| Reading order | Full Bourne order → | Full The NUMA Files 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.