Friends With Boys by Faith Erin Hicks

The story follows Maggie McKay, a teenage girl who has been homeschooled her entire life and is now transitioning to public high school. As she navigates the challenges of fitting in and making new friends, Maggie is also haunted by the ghost of her mother, who left the family years ago. With the support of her three older brothers and new acquaintances, Maggie learns to confront her fears, embrace her individuality, and find her place in the world, all while unraveling the mystery of the spectral presence that lingers in her life.