There had been concerns that copies of 'Half-Blood Prince' would arrive as late as July 23rd for those fans who ordered copies from Amazon.

It has now been announced that all copies of the sixth book will arrive on July 16th for no extra charge.

The book will be delivered via United Parcel Service Inc. and the U.S. Postal Service. The company will refund customers in the continental U.S. who don't receive the book on time.

However, some restrictions do apply.

The same announcement also applies to Amazon.co.uk and Amazon.ca.

Source: The Leaky Cauldron