What is it with all of this envy over J.K.Rowling?
Every author is 'heavily influenced' by every other author they've ever read, especially any they've liked. In fact, Stephen King even goes so far as to recommend that a budding author do nothing else other than read other authors, in order to soak in their magic.
So what books has J.K.Rowling been 'inspired' by? Well, going from my own personal knowledge, it's certain that the authors that feature heavily within the Harry Potter series are, in order, Terry Pratchett (Unseen University of Wizards), J.R.R.Tolkien (Sauron, Gandalf, and the relationship between Frodo and Sam), and C.S.Lewis (Plucky British private school children take on the evil world of dark magic). There are probably tens if not hundreds of others (The Brothers Grimm, Robert Graves, and Roald Dahl spring to mind.)
This is the problem with intellectual property, of course, which is a horrible manifestation of the state propping up intellectuals in return for their intellectual support, which is why intellectual property is something which will eventually disappear, when we finally wither the state in the Austrian revolution.
I myself am writing a BRILLIANT novel, inspired by Dr Sean Gabb, which I'll be self-publishing before Christmas (order hundreds, now). In it I have been 'heavily influenced' by Robert Heinlein, Dr Sean Gabb, Murray Rothbard, Ludwig von Mises, Henry Hazlitt, J.R.R.Tolkien, J.K.Rowling, Stephen King, Ian Fleming, Bernard Cornwell, Patrick O'Brian, C.S.Lewis, Robert Graves, Terry Pratchett, Isaac Asimov, Arthur C. Clarke, and Uncle Tom Cobley and all. Does this stop it being a BRILLIANT novel? Of course it doesn't. What will stop that is a lack of talent on my part (not that I'm worried about that of course), because it's BRILLIANT.
Intellectual Property. It's end cannot come soon enough.