90 year J.D. Salinger sues fan over Copyright Issue

I came across an article where "Catcher in the Rye" Author, J.D. Salinger, filed for an injunction on the publication of a book he says is a copycat of Salinger's "Catcher in the Rye". The book is titled "60 years Later:Coming through the Rye." The author whose writes under the psuedonym John David California,tells the story an elderly Caulfield who escapes from an retirement home,and includes a character version of Salinger.
In an interview with Law Blog writer Ashby Jones, copyright lawyer Marc Reiner seemed unconvinced that Salinger had a winning case against the book. Reiner said that while Caulfield is probably a copyrightable character, “60 Years Later” may qualify as a parody in the court’s eyes, as the “sequel” puts the main character as an old man and may show a “transformative” quality to the original—to what extent the book in question transforms the original work can affect whether it is seen as infringement.
After reading chapter 14 on copyright law, I have better understanding of why Reiner and Jones question the case. To read the full article go to http://www.findingdulcinea.com/news/Americas/2009/June/Salinger-Sues-Fan-Over-Copyright-Issues-Will-He-Win-.html