Natural born angel - Scott Speer

In a world where guardian angels are celebrities who save people
for money, comes the thrilling sequel to IMMORTAL CITY.
Maddy's life changed completely when she became the girlfriend of
the hottest Angel around. But she never imagined that she'd become
more famous than Jackson. Unfortunately for Maddy, she's an irresistible
PR opportunity - soon her popularity soars higher than
any Angel's. Her relationship cannot cope with the pressure.
And then the tension begins to mount between Angels and people, and
she finds herself the ambassador for humankind. With Jackson at
the helm of the Immortals, the two ex-lovers must become sworn
enemies. Until an evil force, bigger than anything on Earth, threatens
to destroy them both... Maddy and Jackson must stand united
if they want to survive.