I'm not saying I don't like Harry Potter, because it's a wonderfully crafted series - but, I want everyone to know that the creatures in JK. Rowling's books weren't her original idea.
Centaurs for example; originate from Greek myths.
I'm tired of people writing hate reviews on other great series like Percy Jackson, The Hobbit, or Game of Thrones, thinking that they plagiarized the Harry Potter series.
Nevertheless, it's a great series and lives up to the rep.