Book data studies
Original, verifiable research built from the Shelfmark catalog (Wikidata CC0 + Open Library) — every number links back to the underlying reading-order pages.
The longest book series in the catalog
The 50 largest series ranked by number of books, with authors, genres, and year spans.
How long is a series in each genre?
Average and maximum series length across every genre with 10+ catalogued series.
The most prolific series authors
The 50 authors with the most catalogued series books, with full-bibliography links.
All figures are computed directly from the catalog — series relationships and ordinals from Wikidata (CC0), cross-checked with Open Library records. Read more about how the data is built. More studies are added as the catalog grows.