Harry Potter author J.K. Rowling is offering a preview of Harry Potter and The Order of the Phoenix, the next installment in the kid wizard saga. But there's a catch: It'll cost you a pretty penny. Rowling has placed 93 random words on a card tantalizing clues about Phoenix that goes up for auction next month at Sotheby's in London. Proceeds benefit Book Aid International, which provides books for developing countries. To get folks excited about the item, Sotheby's leaked a few of the 93 words. "Thirty-eight chapters ... might change ... longest volume ... Ron ... broom ... sacked ... house-elf ... new teacher ... dies ... sorry." The auction gets underway Dec. 12.