Shiver, Linger and Forever - Maggie Stiefvater

A gorgeous collector's set of this addictive and hypnotic trilogy
exploring the all-consuming romance between two star-crossed lovers:
a yellow-eyed wolf boy and a human girl.
For years, Grace has watched the wolves in the woods. Especially
the yellow-eyed beast whose chilling presence she can't seem to live
without. Every winter she watches him, but every summer, he disappears...
Sam leads two lives. In winter, he stays in the frozen woods, with
the protection of the pack. In summer, he has a few precious months
to be human, until the cold makes him shift back again.
When Grace and Sam finally meet, they realize they can't bear to
be apart. But can they find a way to stay together as the stakes
grow higher and death comes closing in?