Some of my students seem to think so - they're desperate to read about Grace and Sam (he's a werewolf in winter, a human being in summer, and coming close is the year when he won't change back when winter ends...). My lovely local bookshop's teen/fantasy specialist told me Shiver is her new favourite book.
First of a trilogy (Linger, the second book, cover below, is out next year), film rights already sold (unsurprisingly) and author Maggie Stiefvater has a website here. She has a book trailer for Shiver here, along with some other resources and reviews..
.PS. Above is the hardcover of Shiver; a paperback is also available. Covers sourced from the author's website..