By the Pale Moonlight (Book One of the Moonlight Series)
When Makenna Wilhelm discovers her best friend, Ty, is a werewolf, she fears he may be to blame for the death of one of their classmates. She sets out to prove his innocence, only to discover she was the intended prey. Now she must discover the truth before time runs out. When the sun goes down, and the full moon rises...the hunt begins.