Like many of my voracious-reader friends, I am listing several multi-volume series in my 10.
- Anne of Green Gables by LM Montgomery (8 books)
- Chronicles of Narnia by CS Lewis (7 books)
- Zion Chronicles/Zion Covenant by Bodie Thoene (11 books)
- Outliers by Malcolm Gladwell
- Harry Potter by JK Rowling (7 books)
- The Alchemist by Paulo Coelho
- The Last of the Really Great Whangdoodles by Julie Andrews Edwards (Thanks, Mrs S!)
- Caddie Woodlawn by Carol Ryrie Brink
- in Death series by JD Robb (48 books and counting)
- and, of course, The Bible (66 books)
These are the off-the-top-of-my-head. It wouldn't be a stretch to list a dozen in a dozen categories, from mysteries, to biographies, to set-your-head, to kid lit, to YA, to humor, to classics... one of the problems of this list is it's skewed by what I've seen on others' lists!