On Twilight's Wings - Revised Edition

Catarina Michelangela Conte is a foster child living in Washington State. Until a few months ago, her life was filled with simple worries, like why her foster parents seem to dislike her or if she'll be shipped off to yet another boarding school over the summer. But shortly after she finds out that she'll be remaining home for the summer, she starts having visions, headaches, and terrible pains. Then a guy around her age shows up and suddenly her visions are showing her events surrounding him and strange beings.

She's sure she isn't crazy, and she wants answers from this Gabriel who showed up out of nowhere, but he isn't giving them, and the more she sees in her visions, the less certain she is that she wants them.