JK is a widley known author that wrote many books. Including some of my personal favs:
Harry Potter and the Sorcers Stone
HArry Potter and the Camber of Secrets
HArry Potter and the Prisoner of Azkaban
HArry Potter and the Goblet of fire
HArry Potter and the Order of Phenix
Harry Potter and the Half-Blood Prince
HArry Potter and the Deathly Hallows
She also wrote many others,
The Casual Vacansey
Very Good Lives
Quidditch through the Ages
Fantastic Beasts and where to find them
The Silkworm
*Hope that helps!