Madeleine bookmarks bound for the final Harry Potter book
Harry Potter and the Deathly Hallows, the seventh and last book in the series, is due out on July 21 amid mass publishing hysteria.
Indirect approaches have been made to the author about featuring Madeleine in the books and a decision is expected soon.
Kate and Gerry McCann are determined to keep their daughter’s abduction in the public eye in the hope that someone might hold the key to her whereabouts.
It is now 30 days since Madeleine was snatched from her bedroom in the Algarve resort of Praia da Luz.
Ms Rowling has already publicly supported the campaign to find Madeleine by contributing to a multi-million pound reward and has been asked about involving the little girl in the launch of her latest book.
Mr McCann said: “There has been some indirect contact with her. We are thinking about getting bookmarks with Madeleine´s photographs and getting authors’ agreement. Someone like JK Rowling has got massive appeal but we would have to speak to her directly. A Harry Potter book would be ideal.”
The McCanns are realistic about the fact that media interest in their daughter will die down.
But they are planning to hold a Madeleine Day in the next couple of months to remind people if she still has not been found.
Mr McCann said: “I think it would be later this year, once the media attention has dropped down to bring it back up hopefully for a short period to remind people.”
He said the day might focus around sport or music, with possible backing from one of the celebrities who has already backed the campaign.
“What we want is to get the maximum message out there now about her disappearance. Then we will do things to bring it back up occasionally just to remind people if she is not found.”
Meanwhile, as forensic specialists continued to examine more than 200 DNA samples, Portugal’s investigative police authority said it thought the abductor may have originally wanted money.
Police spokesman Olegario Sousa told the Diario de Noticias: “We continue to admit that whoever took the child could have had the objective of a ransom but didn’t ask for it because they panicked at the media attention with this case.
“Who would ask for money for the girl when her image is running around the world?”
Voicing the McCanns’ worst fears, he said: “A kidnapper could have the child well hidden and close by. The kidnapper could be a sexual predator who, after satisfying their desires, got rid of the body.”
Mr Sousa said another theory is that Madeleine has been taken by a paedophile involved in child pornography.
If that happened, he said: “It would be difficult for films made with the child to enter the circles of child pornography for all of those will be analysed with a magnifying glass.”
