It's late at night, and you're on a tour of a so-called haunted house. You see something out of the corner of your eye and quickly snap a photo. Your hands tremble as you lower the camera. Your eyes widen as you stare at the image you've just captured. A face seems to be lurking in the background. But when you look up, there's no one standing there! Was it a ghost?

Ghost sightings are reported all the time. Many are easily explained. Others are harder to dismiss. But is there any proof? To find out, Kelly Milner Halls explored haunted houses. She examined photographs and investigated eyewitness accounts from ghost hunters, mediums, and paranormal experts. What's the verdict? Are the spirits of the dead wandering among us? Explore her findings and decide for yourself.