The Underworld Trials of Luna
Precisely that.
“So,” I say, snapping my eyes back to Life, my promise to leave the subject alone rather falling to the wayside. “He can come back to my world?” I ask, pointing at Tony. “And he won’t fade away or anything?”
“Your world has different rules,” Life says, crossing her arms over her chest and raising an eyebrow, studying her son. “He won’t be corporeal – at all – and will have even less presence than he does here. But he can go – ghosts have found their way to that world before, he won’t be the first.”