From The Telegraph:
Harry Potter and the Half-blood Prince is due to be published at midnight on Saturday and is expected to be the UK’s best-selling adult hardback of the year.
I realize that plenty of adults are going to be reading the book, but last time I checked it is still categorized as a childrens book.
Pirated eBook update: There are a few .torrents floating around that purport to be the book, but they’re actually bad fanfic novels. Who writes a 289 page Harry Potter fanfic? Hopefully a legit illegitimate copy will turn up soon after the actual release. Please don’t make me lug that thing!