On it being YA or not, I don't think that this particular "award"/reading list should be the deciding factor. According the the award's website: "Each year, the Popular Paperbacks committee creates lists of books to encourage young adults to read for pleasure. The lists of popular or topical titles are widely available in paperback and represent a broad variety of accessible themes and genres." It says nothing about the books being exclusively YA books, only that they are books that would appeal to young adults. If you look at the list for 2003, many books marketed to adults are included (e.g., The Eye of the World):
See http://www.ala.org/yalsa/booklistsawa...
(Librarian corrections being made to the book bringing the question up which had the award in the book synopsis instead of awards section.)