What to read after Ghostgirl: Lovesick?

Before she can rest in peace, Charlotte Usher must return to the tragic site of her death: High School. On the brink of Dead Ed graduation, Charlotte and her fellow classmates learn they have one last mission to complete before gaining entrance to the much-anticipated afterlife: Observe one designated teen with an unexplained problem and help said-troubled teen by Prom. For the life of her, Charlotte can't imagine why she has been assigned to help Damen, last year's Homecoming King and her former fatal crush. To make matters worse, her boyfriend Eric is sent to look after her best (breathing) friend Scarlet, who has since ditched her goth girl image for a girlier look that turns more heads than just her boyfriend Damen's. Charlotte would die (again) for love. But when her only chance at an afterlife means having to face the dreaded, all-too-familiar pains of being invisible, it may be too much for her to handle.