From his blog:
I’m disappointed about this, but as my brother reminded me this morning, I am very, very lucky. I have the best readers in the world, readers who care not only about my books but also about each other. So thank you, in advance, for not sharing spoilers—whether you read The Fault in Our Stars before or after January 10th.
The other day, when I realized that the pub date was fast approaching, I bopped over to the Big A to pre-order it... and was quickly reminded by their creepy automated system that I'd already placed an order for it back in September.
Gone are the days of accidentally ordering four copies of the same book, I guess. Which, oddly enough, kind of makes me sad.