The Ghost in the Wood — Marianne Mitchell

Twelve-year-old Zeke is not thrilled when his dad announces they're moving into an old cabin in the Colorado mountains. He's sure life will be boring stuck out in the woods. But he's so wrong. When Zeke handles pieces of lightning-struck wood, he releases the ghost of a boy who was killed in a tree house fifty years before. Now the ghost is demanding attention, causing harm to Zeke's family and looking for justice. It's up to Zeke to solve the mystery behind the boy's death and give the ghost peace.