Scholastic Inc, J.K. Rowling and Time Warner Entertainment Company, L.P, Plaintiffs/Counterclaim Defendants, -against- Nancy Stouffer: United States District Court for the Southern District of New York". ICQ. 17 September 2002. Archived from the original on 7 June 2007 . Retrieved 12 June 2007. Harry Potter: Meet J.K. Rowling". Scholastic Inc. Archived from the original on 4 June 2007 . Retrieved 27 September 2008. Wetherill, Louise. "Harry Potter: Merely Frodo Baggins with a Wand?", in Ampthill Literary Festival Yearbook 2015. Ampthill: Literary Festival Committee, 2015. ISBN 978-1-5175506-8-4, pp. 85–92. Knapp, N.F. (2003). "In Defense of Harry Potter: An Apologia" (PDF). School Libraries Worldwide. International Association of School Librarianship. 9 (1): 78–91. Archived from the original (PDF) on 9 March 2011 . Retrieved 14 May 2009.

In 2016, an article written by Diana C. Mutz compares the politics of Harry Potter to the 2016 Donald Trump presidential campaign. She suggests that these themes are also present in the presidential election and it may play a significant role in how Americans have responded to the campaign. [125]UGO Team (21 January 2010). "Best Heroes of All Time". UGO Networks. Archived from the original on 15 June 2011 . Retrieved 3 April 2011. J.K. Rowling Interview". CBCNewsWorld: Hot Type. 13 July 2000. Archived from the original on 23 April 2011 . Retrieved 9 April 2008. Further information: Harry Potter fandom "Platform 9 + 3⁄ 4" sign on London King's Cross railway station

Michael Rosen, a novelist and poet, held the opinion that the books were not suited for children, as they would be unable to grasp the complex themes. Rosen also stated that "J. K. Rowling is more of an adult writer." [111] The critic Anthony Holden wrote in The Observer on his experience of judging Harry Potter and the Prisoner of Azkaban for the 1999 Whitbread Awards. His overall view of the series was negative – "the Potter saga was essentially patronising, conservative, highly derivative, dispiritingly nostalgic for a bygone Britain", and he speaks of "a pedestrian, ungrammatical prose style". [112] Ursula K. Le Guin said, "I have no great opinion of it [...] it seemed a lively kid's fantasy crossed with a ' school novel,' good fare for its age group, but stylistically ordinary, imaginatively derivative, and ethically rather mean-spirited." [113] By contrast, author Fay Weldon, while admitting that the series is "not what the poets hoped for", nevertheless goes on to say, "but this is not poetry, it is readable, saleable, everyday, useful prose". [114]

Record print run for final Potter". BBC News. 15 March 2007. Archived from the original on 25 March 2007 . Retrieved 22 May 2007.