If your book shelves are positively heaving under the weight of JK Rowling's much-loved creations, then you may want to take a moment or two to do a little investigating.
According to author Philip W Errington who worked at famous auction house Sotheby’s, certain editions of the world-famous series could net you thousands - a revelation which Mr. Errington reveals in his new book J.K. Rowling: A Bibliography 1997-2013.
Confirming the reports, Matthew Haley, head of books at auction house Bonhams, asserted: "Bonhams sold a set of first editions of the Harry Potter books in 2005 for £14,400, and on two occasions in 2007 sold copies of The Philosopher’s Stone for £9,000."
Outlining the criteria needed to secure a princely sum for the world-famous tomes, he continued: "That first book in the series is worth hugely more than the subsequent volumes, and condition is everything."
"More recently, first editions of the first book in fair condition have sold for around £4,000. Obviously genuine signatures or even better inscriptions by JK Rowling can add tremendously to the value," he explained.
If you're unsure whether your pristine condition book collection is worth anything, experts have advised the public to look for anything out of the ordinary - different covers, illustrations or large print for example.
Not enough info?
Well, let's put it this way, if you happen to own a hardback edition of Harry Potter and the Philsopher’s Stone which was published by Bloomsbury and sports a cover depicting Harry standing beside a train, you may have just found yourself your ticket outta here!
