Elegy

Tara Hudson brings the dark, romantic Hereafter trilogy to a thrilling conclusion with her YA novel Elegy. The passionate love between ghost girl Amelia and human boy Joshua was powerful enough to break the barrier between life and death. Now the star-crossed lovers believe they can finally be together. But demonic forces threaten to tear them apart. The evil beings tell Amelia she must turn herself over to darkness or they will kill a human every week. Forces of light offer Amelia a solution.
She can join them in gathering souls. If she does, however, she will never see Joshua again. Amelia refuses to be separated from Joshua. She will fight the forces of darkness and light if that's what it takes to keep him.