This is a perfect partner to "One for the Murphy's". Both books are about kids living in tough situations, with moms who are trying their best but it just isn't good enough.
In this story Jack wakes up far from home and finds that his mom has disappeared. He waits for her to return, but soon comes to the realization that he has no idea when that will happen or if she will be able to find him. This is a book about perseverance and ingenuity as Jack tries to find what he loves most.