Stardust: Book 2 of 4 (Assassins Series)

He is as dark as the night sky she is as bright as the stars.

HARPER BRADFORD THE LONE WOLF ASSASSIN.
WHEN HE SEES THE LIGHT, HE’LL STOP AT NOTHING TO PROTECT IT FROM BEING CORRUPTED BUT IT MIGHT BE TOO LATE.

ABIGAIL ANDREWS THE RUNAWAY CRIME FAMILY PRINCESS.
AFTER THE ULTIMATE SACRIFICE. SHE’S FACED WITH AN INWARD BATTLE TO KEEP HERSELF ALIGHT IN THE EYES OF THE ONE WHO WITNESSED HER SHINE BEFORE IT’S SNUFFED OUT.

What happens when the dark collides with the light?