Harry Potter her publishers to adopt a more gender-neutral pen name in order to appeal to the male members of this age group, fearing that they would not be interested in reading a novel they knew to be written by a woman. She elected to use J. K. Rowling (Joanne Kathleen Rowling), using her grandmother's name as her second name because she has no middle name. "Harry Potter and the Philosopher's Stone" was published by Bloomsbury, the publisher of all "Harry Potter" books in the United Kingdom, on 26 June 1997. It was released in the United States on 1 September 1998
Fictional universe of Harry Potter time and date of the next Dumbledore's Army meeting instead of the serial number. As explained in "Harry Potter and the Philosopher's Stone" there are 17 silver Sickles to a gold Galleon, and 29 bronze Knuts to a Sickle. According to Pottermore, the wizards never changed their units of measurement (i.e. feet to metres, ounces to grams, pounds to kilograms, etc.) because they can do the calculations with magic, so strange number conversions do not bother them. In a 2001 interview, J. K. Rowling said a Galleon was approximately five pounds (at the time of the interview approximately US$7.50 or