Harry Potter and the Cursed Child: Parts One and Two

From Author Wars - https://authorwars.com/publications/harry-potter-and-the-cursed-child-parts-one-and-two-576621.html

Overview:

Title: Harry Potter and the Cursed Child: Parts One and Two
Author: Jack Thorne, John Tiffany, J. K. Rowling
Year: 2016
ISBN-10: 9780606384964
Publisher: Turtleback Books
Price: $45.20
Pages: 320
Binding: Hardcover
Type: Novel
Title Reference: Harry Potter and the Cursed Child: Parts One and Two
Notes: Library binding. Data from Amazon.com as of 2016-06-24. "Special rehearsal edition". Per the "About the Production" section in the back of the book, all three are listed as the authors of the original story.