It’s funny you should mention the Vander Ark case, because I’ve just been writing an abstract for ACR which briefly mentions the on-going litigation. It’s only the latest in a long line, of course, and by no means the worst (that, to my mind, was when Rainforest slapped an injunction on a ten-year-old, who wasn’t allowed to read his own copy of Deathly Hallows, even though he’d bought it perfectly legitimately).

Rowling is famously paranoid and has something of a litigation addiction, from what I can make out. Her fans were broadly supportive while the series was alive but now that Harry has hung up his broomstick – and everyone finally knows how it all ends – they’re rather less forgiving, I reckon.

The treatment of Vander Ark seems especially mean spirited, since there are several Potter lexicons already in print (Muggles and Magic by George Beahm, for example) and she herself has confessed to using such sites to keep track of her own characters.