Who wrote the book that the game Lego Harry Potter: Years 1-4 is based off of?
Lego Harry Potter: Years 1–4:  The game is based on the Lego Harry Potter line and its storyline covers the first four films in the "Harry Potter" series: "Harry Potter and the Sorcerer's Stone", "Harry Potter and the Chamber of Secrets", "Harry Potter and the Prisoner of Azkaban", and "Harry Potter and the Goblet of Fire". Harry Potter and the Goblet of Fire (film):  It is based on the novel of the same name by J. K. Rowling.
J. K. Rowling