It's Watching - Lindsay Currie

A chilling middle school novel from the New York Times bestselling author of Scritch Scratch, three kids must discover whoor whatis terrorizing them after receiving an ominous meme on Halloween night.
On Halloween night, Josie and her two best friends, Jackson and Alison, sneak into the infamously haunted Bachelor's Grove cemetery. They are hoping to prove the existence of a famous ghost to secure coveted editorial spots on the school newspaper. Instead, they are chased out by a security guard before they gather any evidence...or so they think.
Later, a sinister meme appears on their phones. It's an image of the "phantom farmhouse," an evil apparition rumored to appear to unlucky visitors at Bachelor's Groveluring them in...and never letting them outwith the words I'm watching dripping down the screen.
Soon, strange and scary things begin to happen all around them. When a second meme from the same number arrives, this time with a countdown, they realize they have only three days to figure out who is terrorizing them. As they investigate, the trio must use their journalistic skills to uncover the truth, or risk becoming a part of the graveyard's sinister past forever.