Forgive Me Kobe by Avril Sabine

In an effort to salvage a friendship, Kobe turns up at school after dark. Things rapidly go wrong and he's held at gunpoint, along with his friend Xavier, fearing he'll lose more than a friendship. When a ghost offers to help, Kobe doesn't know if he's lost his mind, has already died or if ghosts might actually be real. And if ghosts are real, how can one help him and Xavier escape from the gunmen?