In continuing to tinker with the universe she built eight years after it ended, J.K. Rowling might be falling into the same trap as Star Wars’s George Lucas.
September 1st, 2015 marked a curious footnote in Harry Potter marginalia: According to the series’s elaborate timeline, rarely referenced in the books themselves, it was the day James S. Potter, Harry’s eldest son, started school at Hogwarts. It’s not an event directly written about in the books, nor one of particular importance, but their creator, J.K. Rowling, dutifully took to Twitter to announce what amounts to footnote details: that James was sorted into House Gryffindor, just like his father, to the disappointment of Teddy Lupin, Harry’s godson, apparently a Hufflepuff.
It’s not earth-shattering information that Harry’s kid would end up in the same house his father was in, and the Harry Potter series’s insistence on sorting all of its characters into four broad personality quadrants largely based on their family names has always struggled to stand up to scrutiny. Still, Rowling’s tweet prompted much garment-rending among the books’ devoted fans. Can a tweet really amount to a piece of canonical information for a book? There isn’t much harm in Rowling providing these little embellishments years after her books were published, but even idle tinkering can be a dangerous path to take, with the obvious example being the insistent tweaks wrought by George Lucas on his Star Wars series.