Updated: May 12, 2020
In the following list, we have mentioned the top 20 best-selling book series of all-time. This list is based on the number of copies sold.
If you are a voracious reader, then these books are a must for you. You'll surely love reading them.
10 Best-Selling Book Series of All-Time
#1 Harry Potter (500 million copies sold)
This great blockbuster needs no introduction! Authored by J. K. Rowling, it's one of the best series ever written.
#2 Goosebumps Series (350 million copies sold)
If you are a fan of horror fiction, then these books by R. L. Stine are just the right one for you!
#3 Perry Mason (300 million copies sold)
Want to read detective stories. This series by E. S. Gardener would be the best for you!
#4 Berenstain Bears (260 million copies sold)
Berenstain Bears, written by Stan and Jan Berenstain is one of the best book series in children's literature.
#5 Choose Your Own Adventure (250 million copies sold)
How about a gamebook? Sounds interesting, doesn't it? This classic will keep you entertained throughout!
#6 Sweet Valley High (250 million copies sold)
Our next best selling book is authored by the American author Francine Pascal, and ghostwriters. It's a must-read for young adults.
#6 Nancy Drew (200 million copies sold)
Nancy Drew novels, written by Carolyn Keene has been translated in over 45 languages.
#7 The Railway Series (200 million copies sold)
This epic, authored by Rev. Wilbert Awdry and his son Christopher Awdry has been inspired by the children's television series, Thomas & friends.
#8 Robert Langdon Book Series (200 million copies sold)
This book series is written by Dan Brown and named after his fictional character Robert Langdon.
#9 Diary of a Wimpy Kid (200 million copies sold)
The books are authored by one of The World's Most Influential Persons, Jeff Kinney and are a favourite of teens.
#10 The Baby-sitters Club
This series, written by Ann M. Martin, has also been made into a Television Show.