Young Adult Literature
Here's an analogy: Hope Was Here: Young Adult Literature :: Halloween: Horror Movies.
In other words, it's a perfect fit.
In today's world, most young people can relate to the things Hope deals with in this novel: moving frequently, leaving friends behind, being the "new kid" at school, getting all nervous when someone you like asks you out on a date, having a family member with cancer, getting involved in local politics, working in a restaurant. And while several of these issues are quite serious, Hope doesn't take herself too seriously.