Yes, they can be. Ghost stories often play on our fears of the unknown, and in this book, they might be especially spooky. The short format allows for quick jolts of fear.
At a campfire, a girl heard a faint whisper. Looking around, she saw a shadowy face in the trees. It disappeared as quickly as it came. She never went camping there again.
A girl walked through an old cemetery. Suddenly, she felt a cold hand on her shoulder. She turned around but saw no one. Then she heard a whisper in her ear saying 'Leave this place'. She ran as fast as she could. The feeling of being watched followed her all the way home.