Phantom Light — Susan Dix

When Anne goes to Lost Lake to live with old Mrs. Burton, she walks into a web of terror. Someone sends Anne threatening messages and locks her in a wardrobe, setting a fire near it. And a mysterious light flashes across the lake at night, frightening Mrs. Burton.

Who's behind it all? Handsome Reed, Mrs. Burton's strange nephew? Hunter, who prefers to hide in his cabin in the woods? George Revard, their angry neighbor?

Anne understands just one thing - someone is trying to frighten her or Mrs. Burton... to death.