Listen to this!
As it was reported in the Wall Street Journal:
The audiobook version of J.K. Rowling's newest Harry Potter novel Harry Potter and the Order of the Phoenix will take up a total of 26 and a half hours of audio tape, as reported by the Wall Street Journal today.
In the months preceding the appearance of the new Harry Potter tale, Random House has placed great emphasis on security. The employees of the publishing house will undergo elaborate security checks, similar to those carried out at airports, as they are screened for CDs and cassettes. They must also sign a special security declaration. The ready-to-be-sold audiobooks will be stored in safes and guarded by security personnel.
Thanks to HPANA for the tip.