Avi's Something Upstairs is a story about a young boy named Randy who is struggling to cope with the death of his mother. He is sent to live with his aunt and uncle in their old, spooky house, and he soon begins to experience strange and frightening things. As Randy tries to unravel the mystery of what's going on in the house, he learns the importance of facing his fears and relying on his friends for support.
Throughout the story, Randy is confronted with a number of challenges that he must overcome. He is afraid of the dark, he is afraid of being alone, and he is afraid of the unknown. But with the help of his friends, he is able to face his fears and come to terms with his mother's death.
The theme of friendship is also central to the story. Randy's friends are always there for him, no matter what. They support him through his tough times, and they help him to see the good in himself. They also help him to see the good in the world, even when things are tough.