“The book is a reprint of the Star Wars Legends novel Star Wars Episode VI: Return of the Jedi (junior novelization), which was written by Ryder Windham, edited by Egmont editor Emil Fortune to make the book fit with the current new canon.”
That’s wild and also insane. What would they have to change of junior novelizations of the OT to make them canon? Without any further explanation, I wouldn’t trust Wookieepedia on this.