The Harry Potter book series was written by J.K. Rowling. The series is seven books long. Pottermore explores the series by portraying events via moments, and enhances the reading experience by providing new information written by J. K Rowling. The series is as follows:
| 1 | 
|
Harry Potter and the Philosopher's Stone (published as Harry Potter and the Sorcerer's Stone in the US) |
17 chapters | 43 moments* |
| 2 | 
|
Harry Potter and the Chamber of Secrets | 18 chapters | 45 moments† |
| 3 | 
|
Harry Potter and the Prisoner of Azkaban | 22 chapters | 39 moments |
| 4 | 
|
Harry Potter and the Goblet of Fire | 37 chapters | 39 moments |
| 5 | 
|
Harry Potter and the Order of the Phoenix | 38 chapters | 12 moments |
| 6 | 
|
Harry Potter and the Half-Blood Prince | 30 chapters | 12 moments |
| 7 | 
|
Harry Potter and the Deathly Hallows | 37 chapters | 14 moments |
* Previously 45; "Harry Goes Shopping" and "The Sorting Hat were removed.
† Previously 46; "Letters from School" was removed.