Protaganist of a best-selling series of books by JK Rowling. It deals with the his adventures in an alternate universe where magic exists. He fights against the bad guy Voldemort, who killed his parents and wishes to annhilate all the Muggles(i.e- non-magic poeple). Often described as "kiddy books", they are actually very, very well written. The plot is intriguing and quite insightful. It can be read by both kids and adults as it appeals to the two factions on different levels. While most kids think the magic and the fairytale-like aspects are cool, adults can appreciate and relate to the many moralistic debates it brings up.
The movies are complete shite though and rather painful to watch, though. So let's not even go there.
Harry Potter is a best-selling series of books by JK Rowling. And with good reason! Go read them!