Isn't this cover gorgeous? My copy is the movie edition but I like this cover much more.
The story follows 18-year-old Tristran Thorn, who promises his beloved Victoria that he will fetch a fallen star for her. If he does, she will do whatever he wishes. Tristan must go into the land of Faerie and brave witches, enchantments and murdeous kings in order to fetch the star and bring her (yes, the star is actually a girl) back to his love. The ending is delightful and ties the plot together nicely.
It's definitely appropriate for a YA audience but adults will like it just as much. For me, it's a comfort read--easy, delightful and worth savoring.