Harry Potter

I got the "Deathly Hallows" from the library and started reading it. I can hardly follow it because its been so long since I read the last book. If it wasn't for watching the three DVDs with Anja while she was here I would really be lost. I have not idea what a "Horcrux" is or how to kill one without a Basilisk fang. Death Eaters and Dementors confuse me. Which is which and what do they do to you? They should have a directory of these terms. Maybe I should google them as they come up.