Jessica [Paperback]

There is no Jessica, said Ruthie's parents. But of course there was. She ate with Ruthie, played with Ruthie, and was sorry when Ruthie was bad. Nobody could see Jessica -- except Ruthie. When it came time for Ruthie to go to school, Jessica went with her. Her parents hoped Ruthie would find a friend at school who would replace Jessica. They were in for a (happy) surprise!