Written by JK Rowling.
Read by Jim Dale.

Sorcerer’s Stone - 7 discs.
Chamber of Secrets - 8 discs.
Prisoner of Azkaban - 10 discs.
Goblet of Fire - 17 discs.
Order of the Phoenix - 23 discs.
Half Blood Prince - 17 discs.
Deathly Hallows- 17 discs.