Books like Into the Grey by Celine Kiernan

The story of a greaser and his friend, who are torn apart by the world's two types of people and must learn to cope with their differences.

Teenager Suze faces a haunting dilemma when a ghostly love entangles her with a living admirer, forcing her to choose between the dead and the living.

When Earth faces a hidden alien invasion, Rachel and her friends discover they are the only ones who can defend the planet.

Sammy Jacobs, a teen fascinated with ghosts and sci‑fi, discovers an invisible friend lurking in his own room, gobbling breakfast cereal. As his parents remain skeptical, Sammy must find a way to rid himself of the unseen menace.

Dana Fear spends her senior year at Shadyside High surrounded by the town’s eerie legacy. When the Night People club uncovers strange disappearances, she must confront a lurking menace that threatens her new friends and her own family’s shadows.

Three siblings venture into a haunted library and discover a book that lets them enter a supernatural realm, where they must confront the mysterious spirit world of Chateau Frankenstein.

A former IRA hit man, haunted by the ghosts of the 12 he killed, seeks redemption by targeting the men who ordered him. Amid political intrigue, he draws a forbidden attraction that threatens his quest for peace.

From McDermid's webpage: "Four in the morning, mid-December, and snow is smothering St Andrews. Student Alex Gilbey and his three best friends are staggering home from a party when they stumble upon the body of a young woman. Rosie Duff has been raped, stabbed and left for dead in the ancient Pictish cemetery. And the only suspects are the four young students stained with her blood. Twenty-five years later, Fife police mount a cold case review. Among the unsolved murders they’re examining is that of Rosie Duff. But someone else has their own idea of how justice should be done. One of the original quartet dies in a suspicious house fire. Soon after, a second is killed in what looks like a burglary gone sour. But Alex fears the worst. Someone is taking revenge for Rosie Duff. He has to find out who it is before he becomes the next victim. And it might just save his life if he can uncover who really killed Rosie all those years ago."

A determined young poet, Carl Foster, pursues the famed opera singer Rosetta Rose despite a series of deadly mishaps, all while the jealous ghost of Lord Clarenceux watches.

Fifteen‑year‑old Billy is tasked with guarding a castle prison, but his duty soon deepens when the ghosts of executed inmates begin to haunt the walls.

The eleventh book of the Goosebumps Series 2000, featuring spooky adventures in a graveyard.

A summer camp nightmare turns into a spooky romance as Samantha dreams of a boy in an abandoned cabin, only to find him real—and deadly jealous.

After a night at the old Graydon mansion, Tracy is convinced the place is haunted by Victoria Graydon, a restless ghost who murdered her sister. Determined to help, she faces disbelief from her boyfriend Mac.