JK.Rowling sold her 800 word prequel of Harry Potter £25,000 at charity auction (i think this woman is misusing her reputation) .The story is set three years before Harry is born and features the characters Sirius Black and James Potter, Harry's father.They get in a scrape with irate policemen before making their escape via broomsticks, drumsticks and a little bit of magic. today waterstoneswys put the prequel on it's site . you can read book (the handwriting) online by clicking on Read Our Author’s Stories and then selecting Rowling's name. a picture and some more info can be seen on here.
source : dementor.ir (thanks to omid for شبکه دیوانه ساز ایرانی)