Ender's Game hands down.
The other books we've had to read have been dreadfully dull or just crap in general. For one, I cannot fathom how To Kill A Mockingbird is actually seen as a good book. The same I can probably say for the Adventures of Huckleberry Finn. While Huck Finn started off rather well with decent characters that were actual characters, it ended in a way where Huck lost all since of what once made him a real character, and just fell in under Tom, while the rest of the characters just became two deminsional. And beyond that, there was no plot anyway, so if the characters we kind of bad, the ending was lazily written, and the only settings were small towns and the Mississippi, where in that formula do we get a good book?
As for To Kill A Mockingbird, my major complaint with that is the lack of plot also for it. Nothing really happens, it just sits there, and the only things that do happen are the trial which is only a few chapters, and then the random attack from Bob, but I don't see how those few things in themselves can carry the whole of the book.
Maybe it's just because I'm still a teenager, so I don't fully get it, but I really would like someone to tell me what was so great about these books.
Though I suppose this thread is for books we liked, not disliked, so I'll add to my list, but most will probably be short stories instead of full books.
The Epic of Gilgamesh
Metamorphesis
Things Fall Apart(This was my favorite last year)
A Farewell to Arms
The Great Gatsby(only barely does it make my list though)