Halo, by Alexandra Adornetto

(@AlexandraHalo) American Book Trailer.
Three angels are sent down to bring good to the world: Gabriel, the warrior; Ivy, the healer; and Bethany, a teenage girl who is the least experienced of the trio. But she is the most human, and when she is romantically drawn to a mortal boy, the angels fear she will not be strong enough to save anyone—especially herself—from the Dark Forces. Is love a great enough power against evil?

Read the first entry in this trilogy, written by eighteen-year-old Australian author Alexandra Adornetto.

Halo by Alexandra Adornetto
Feiwel and Friends
An imprint of Macmillan Children's Publishing Group
(From the YouTube description)