Here are some of the most popular book series of all time, including their estimated number of international sales. If you’re looking for some epic sories, some classic books, or even a series of books to get lost in for a while, here are the best selling book series of all time.

1. Harry Potter – J.K. Rowling – 450 Million Sales

book series

Rowling absolutely killed it with this book series. Along with the movie franchise, Harry Potter has become undoubtedly the biggest selling series of all time.

2. Goosebumps – R.L. Stine – 350 Million Sales

book series

Goosebumps is a series of children’s horror fiction novels by American author R. L. Stine. The stories follow child characters, who find themselves in scary situations.

3. Perry Mason – Erle Stanley Gardner – 300 Million Sales

book series

Perry Mason was featured in more than 80 novels and short stories, most of which had a plot involving his client’s murder trial.

4. Peter Rabbit – Beatrix Potter – 150 Million Sales

book series

These stories are a timeless classic meant as much for adults as children. The stories reinforce many important life lessons and the book has been a best for 100 years.

5. Lord of the Rings – J.R.R. Tolkien – 150 Million Sales

book series

The Lord of the Rings is an epic high fantasy novel written by J. R. R. Tolkien, later fitted as a trilogy. A timeless classic. Make sure you read the books before watching any of the amaing movies.