A rare Harry Potter book that was set to be sold for just 50p in a car boot sale is now expected to fetch £50,000.

The hardback Harry Potter and the Philosopher's Stone book was found while a family was to clearing out their home.

Charlotte, 28, had been helping her mum Karen Rumsey, 59, and placed the book into the 50p pile to be sold.

However, Ms Rumsey and her family later discovered the book could spell a magical Christmas for them after finding out how much it's worth.

Charlotte said: “I didn’t give it a second thought.

"But soon after, on the Antiques Roadshow, someone had some rare Harry Potter books and the experts said they could be worth £13,000.

Karen Rumsey and daughter Charlotte were surprised to find out how much the book was worth

“I rang mum and asked her to check ours.

"I began reading the issue points that identify it as first edition and as she turned the pages everything seemed to be exactly the same.”

Solicitor Charlotte, from Preston, Lancs, had the book’s history confirmed by experts, reports Mirror.

She said: “Mum simply can’t believe she has had such a valuable book sitting on her bookshelf all that time.”

Booker expert Jim Spencer has found seven first editions so far

The 1997 first edition, one of only 500 printed, was given to the family by a friend in 1999.

Karen, from Blackpool, who also has sons Callum, 27, and Cameron, 25, is to have it auctioned by Hansons at Bishton Hall, Staffs, next Friday.

The company’s book expert, Jim Spencer, said: “This is the seventh first edition of Philosopher’s Stone I’ve found. Only another 493 left to go!”

In October the firm sold a similar book for £60,000.