If you haven't at least started reading Harry Potter and the Deathly Hallows yet, most likely your not a fan of the series of you're on the space station. I'm going to review it anyway, though.
In Harry Potter and the Deathly Hallows, the forces of evil are in ascendance. Voldemort's forces can do pretty much whatever they want, and pretty soon the Ministry of Magic is their puppet. Harry, Ron, and Hermione are on a quest to find and destroy the Horcruxes, which ultimately leads to the final battle with Lord Voldemort.
I though this was a very satisfying ending for the series. Most of the plot threads have been tied up. There's lots of good action and some character development. We learn something of the history of Dumbeldore and Snape. We learn what the heck a "Deathly Hallow" is. We find out who dies, and who Hermione hooks up with. We even get to see some of the less pleasant characters in a new light.
The only thing I didn't like was the epilogue. It's set (I believe) nineteen years after the main action, and shows some of the characters sending their children to Hogwarts. I won't get into details (to avoid spoiling it), but it didn't really add much to the story and was boring.
Despite that, this was a great book. I give Harry Potter and the Deathly Hallows a full five yo-yos.