The ten best-selling book series of all time, from Harry Potter's 600 million copies to Nancy Drew's 200 million, ranked by estimated copies sold worldwide.
Harry Potter is the best-selling book series of all time, at more than 600 million copies sold worldwide. Goosebumps is second at 400 million, and Perry Mason third at 300 million, tied with Diary of a Wimpy Kid. The ranking uses the approximate sales figures in Wikipedia's list of best-selling book series, as of October 2026.
A handful of book series have sold hundreds of millions of copies, most of them aimed at children and teenagers. This list ranks the ten best-selling series by estimated copies sold worldwide. Harry Potter leads with more than 600 million copies, 200 million ahead of Goosebumps. Below that the figures are rounded estimates and several series share the same number, so the ties are spelled out on each entry.
J.K. Rowling's seven-novel fantasy series, published 1997 to 2007, has sold more than 600 million copies, the most of any book series. The first novel alone has sold over 120 million, and the series had been translated into 85 languages by June 2017.
R.L. Stine's children's horror series has sold an estimated 400 million copies since 1992, across 62 books in the original series plus spin-off series.
Erle Stanley Gardner's legal mysteries about the defense attorney Perry Mason have sold an estimated 300 million copies across 82 novels and 4 short stories published from 1933 to 1973. Tied with Diary of a Wimpy Kid on sales, it ranks ahead as the earlier series.
Jeff Kinney's illustrated novels about middle-schooler Greg Heffley have sold an estimated 300 million copies since 2004, the same figure as Perry Mason; it ranks fourth as the later series.
The interactive gamebook series, in which the reader's choices decide the ending, has sold an estimated 270 million copies across more than 185 titles by various authors since 1979.
Stan and Jan Berenstain's picture books about a family of bears, continued by their family, have sold an estimated 260 million copies across 428 titles since 1962.
Enid Blyton's Noddy books, begun in 1949 and later continued by other authors, have sold an estimated 250 million copies. It is one of three series tied at 250 million and ranks first of them as the earliest.
Roger Hargreaves' small-format picture books, continued by his son Adam, have sold an estimated 250 million copies across more than 90 titles since 1971; second of the three series tied at 250 million.
Francine Pascal's young-adult series about the twins Elizabeth and Jessica Wakefield, largely written by ghostwriters, has sold an estimated 250 million copies across 400 books published from 1983 to 2003; third of the three series tied at 250 million.
The girl-detective mysteries, written by various authors under the pen name Carolyn Keene since 1930, have sold an estimated 200 million copies across 175 books. Five series are tied at 200 million; Nancy Drew takes tenth place as the earliest of them.
| # | Name | Author | Genre | Books in series | Years of publication |
|---|---|---|---|---|---|
| 1 | Harry Potter | J.K. Rowling | Fantasy | 7 + 3 companion books + 4 scripts | 1997–2007 |
| 2 | Goosebumps | R.L. Stine | Children's horror | 62 + spin-off series | 1992–present |
| 3 | Perry Mason | Erle Stanley Gardner | Legal mystery | 82 + 4 short stories | 1933–1973 |
| 4 | Diary of a Wimpy Kid | Jeff Kinney | Children's comedy | 20 + 9 spin-offs | 2004–present |
| 5 | Choose Your Own Adventure | Various authors | Interactive children's fiction | 185+ | 1979–present |
| 6 | Berenstain Bears | Stan and Jan Berenstain | Children's picture books | 428 | 1962–present |
| 7 | Noddy | Enid Blyton and others | Children's fiction | 24 (original series) | 1949–present |
| 8 | Mr. Men and Little Miss | Roger Hargreaves, Adam Hargreaves | Children's picture books | 90+ | 1971–present |
| 9 | Sweet Valley High | Francine Pascal and ghostwriters | Young adult fiction | 400 | 1983–2003 |
| 10 | Nancy Drew | Various authors as Carolyn Keene | Mystery | 175 | 1930–present |
Series are ranked by the approximate sales figure in the best-selling book series table of Wikipedia's List of best-selling books, read on 18 October 2026. That page counts estimated copies sold (not printed), across all titles and languages, and excludes comics, manga and textbooks; publishing imprints such as Harlequin's romance lines are not on it. Figures are used exactly as the source gives them, and no figure from another source is mixed in. Ties are broken by first year of publication, earliest first: Perry Mason (1933) ranks ahead of Diary of a Wimpy Kid (2004); Noddy (1949), Mr. Men and Little Miss (1971) and Sweet Valley High (1983) share 250 million; and five series share 200 million, of which Nancy Drew (1930) takes tenth place. The other four at 200 million, Jack Reacher, The Railway Series and Thomas & Friends, San-Antonio and Robert Langdon, share that figure but fall outside the top 10 on the tiebreak.
Harry Potter, by J.K. Rowling, with more than 600 million copies sold worldwide. The next-best seller, R.L. Stine's Goosebumps, is estimated at 400 million.
The source list counts book series, not publishers' imprints or brand lines that cover thousands of unrelated titles by different authors, so imprints are not ranked here.
They are estimates, usually from publishers, rounded to round numbers, which is why several series share the same figure. Different sources often quote different totals for the same series; this page uses one source, Wikipedia's list, for every entry so the figures are comparable.
Four series share tenth place's figure of 200 million with Nancy Drew but rank below it on the tiebreak: Jack Reacher, The Railway Series and Thomas & Friends, San-Antonio and Robert Langdon.
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