Rare Potter books to go on sale

The Harry Potter books could raise at least £20,000

A complete set of signed Harry Potter books - believed to be the only of its kind in the world - is being auctioned.

All of the books have been signed by the author JK Rowling and are so valuable that they are being kept in an Aberdeenshire police station.

They will be auctioned off on eBay in aid of local charity Books Abroad which supplies books to children in 80 countries worldwide.

The Potter books are expected to raise at least £20,000.

Rhynie-based Books Abroad has sent an estimated two million free books around the world in 25 years.

'Worthy cause'

A relative of JK Rowling has volunteered for the charity, a fact which is thought to have helped secure the donation of the signed collection.

A Books Abroad spokeswoman told BBC Scotland: "A complete set of special editions was signed by JK Rowling as she felt it was a worthy cause.

"We believe it's the only set available.

"It could be worth £20,000 - or even an awful lot more."