The Secret Diary of Adrian Mole (aged 13 3/4) by Sue Townesend
A hysterically funny insight into the life of this strange young teen who believes himself to be an intellectual. written in the 1980's and set in a small U.K town. I laughed till I cried.
If I had to choose one, it would be The Three Musketeers. I LOVED that book.
Other favorites:
The Things They Carried
The Count of Monte Cristo
A Tale of Two Cities
Water for Elephants
The Time Traveler's Wife
Dracula
Wicked
A Time to Kill