You should whip out your dog-eared, worn out, hardback copy of Harry Potter and the Philosopher's Stone and flip over to page 53 because you could be £20,000 richer. 

Source: independent

First editions of literary greats are valuable collectibles and and so is the case with the tale of the boy wizard, more so because it contains a small typo. 

As ITV reported, the list of required magical equipment young wizards and witches need to bring with them to Hogwarts, the school made a small error by mentioning 1 wand twice. That or they probably needed to emphasize that the wand is a mandatory requirement.

Source: The Sun/PA Press Association

Only 500 copies out of the 4 million sold worldwide since 1997 have this error and are poised to sell for a fortune at Bonhams Fine Books and Manuscripts in London this November. 

Source: tumblr

Sharp-eyed fans have called out the mistake but others were too busy devouring the book as fast as they could to notice the tiny error. 

There are other ways to find out if your copy is worth all that moolah.

The Independent reported that rare book connoisseur Abebooks has listed out what can make your copy a serious collectible worth a whopping amount. If your hardcover book has the print line 10 9 8 7 6 5 4 3 2 1 and the name as Joanne Rowling instead of J.K Rowling, then it's a first edition first issue copy and can fetch $40,000 to $55,000. Paperback first editions were scarce and can be sold for five figure amounts if it is in good condition. 

Source: hercampus

What one book has done to the world.