<Tr> <Th> Media type </Th> <Td> Print (hardback & paperback) Audiobook E-book (as of March 2012) </Td> </Tr> <Tr> <Th> No. of books </Th> <Td> 7 </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.pottermore.com </Td> </Tr> <P> Harry Potter is a series of fantasy novels written by British author J.K. Rowling . The novels chronicle the life of a young wizard, Harry Potter, and his friends Hermione Granger and Ron Weasley, all of whom are students at Hogwarts School of Witchcraft and Wizardry . The main story arc concerns Harry's struggle against Lord Voldemort, a dark wizard who intends to become immortal, overthrow the wizard governing body known as the Ministry of Magic, and subjugate all wizards and muggles, a reference term that means non-magical people . </P>

How many characters are in the first harry potter book