At One Place

Book series

9 book series, longest first.

What How long Covers
The Wheel of Time 12 days 20 hours 15 books, about 4,410,000 words
The Stormlight Archive 6 days 9 hours 5 published books, about 2,187,000 words
A Song of Ice and Fire 5 days 1 hour 5 published books, 1,736,054 words
The Harry Potter series about 76 hours 7 books, 1,084,170 words
The Twilight saga about 41 hours 4 books, 587,246 words
The Lord of the Rings about 32 hours 3 volumes, about 455,000 words
Percy Jackson and the Olympians about 28 hours 5 books, 398,275 words
The Chronicles of Narnia about 24 hours 7 books, about 345,000 words
The Hunger Games trilogy about 21 hours 3 books, 301,583 words