A series of books originally aimed at children and young adults that has become steadily more popular before being massacred by Chris Coumbus, Steve Kloves (die) and their team of monkeys.
Long series short; 10 year old orphan Harry discovers he's a wizard with the help of a big (really big) hairy bloke, and soon begins his education at Hogwarts School Of Witchcraft and Wizardry. Much wackiness ensues, and he finds himself face to face with the baddie who killed his parents.
See also - "Barry Trotter and The Shameless Parody".
For some reason, people always find the need to compare the Potter series to Lord of The Rings
. Why? They're too very different series, and besides, Potter is much better.