By Zubair Ahmed
BBC News, Mumbai
Pirated copies of the new Harry Potter book have hit the streets of Mumbai (Bombay) barely two days since its worldwide release.
Legitimate book sellers have recorded huge sales
Hawkers and street book stalls are offering JK Rowling's Harry Potter and the Half-Blood Prince for $6, compared to the legitimate stores' $20.
Agents from publishers Penguin India are on the prowl, reporting illegal sales to the head office in Delhi.
Mumbai is flooded with pirated copies of movies, music videos and software.
Pirated Harry Potter copies started appearing on Monday, following the worldwide release in the early hours of Saturday.
At almost every major traffic junction the book was being offered by hawkers.
One street bookstall vendor offered the book to BBC reporters but upon learning he was dealing with the media quickly hid it among piles of others.
Penguin India agents said their job was not to confiscate copies but to report to Delhi.
The national booksellers' association has reported the matter to the police, who are likely to conduct raids shortly.
Genuine book stores say they have already sold more than 100,000 copies in Mumbai alone, smashing all previous records.
In its first 24 hours, Harry Potter and the Half-Blood Prince sold 6.9m copies in the US and more than two million in the UK, beating all previous Potter records.