Season of Secrets — Sally Nicholls

Molly and Hannah have just lost their mother, and while Dad "figures things out", they're sent to stay with their grandparents in a quiet country town. Everything is different: there are only ten kids in their entire school; they have to walk home by themselves every day; and a phone call from Dad just isn't the same as a hug. In fact, they're not even sure when, or if, their dad will be back for them.