Harry potter and the half blood prince, hardback, signed

Well kept first edition of the half blood prince. Few marks to front cover as seen on photo but the pages are in great condition. This first edition has the misprint on page 99'eleven OWL'S' when it should read ten. It's signed by the amazing illustrator Jason Cockcroft both in the book and on the dust jacket. I haven't found more like this so it's a rare find for a collector!