Just as riveting in its own way as the author's earlier Soldier Boy about boy soldiers in Uganda, this middle grade novel highlights a little-known aspect of WWI. Unlike some other readers, I have read a couple of other books and poems about the clay kickers, soldiers whose job was to excavate tunnels below the battlefields. But my familiarity with that part of the war and the horrors of trench warfare did not detract from my enjoyment of this well-written book. The author has chosen to tell the stories of four young boys, who have come to this task for different reasons that are slowly revealed over the course of the novel. Thirteen-year-old Thomas Sullivan is desperate to find out what has happened to his older brother, James, declared missing in action. Charlie has left home to escape the attentions of his physically abusive father. Frederick, a privileged son in line for the throne of England, has joined up to prove to his Eton classmates and himself that he is not a coward. George joins the military for a warm bed, a solid meal, and to avoid the law enforcement and those to whom he owes money. While most of the story centers on Thomas, the other boys' stories are just as important in their own rights. Readers will find it hard to like anything about George at first, but as various events unfold, they may change their minds. The author's inclusion of James's experiences on black pages with white font, interspersed between the other stories, adds even more drama to the narrative since readers will have a good inkling that this is James, and that he is still alive. The author describes in vivid language the exhaustive labor involved in digging tunnels such as these on the Western Front as well as the constant dangers from gas or proximity to the Germans. It's clear that war can make even the gentlest of souls behave in inhuman ways, but it's also just as clear that it can make someone treasure moments of peace and quiet. I was pleased to see a war dog, Max, included, with his talent for catching rats and use as a comfort animal. Readers will be surprised to learn from the author's note that the stories related here are not as rare as they might assume since more than a quarter of a million British boys who were underage served during the war. Historical novels about WWI are not all that plentiful or accessible, but this one is an excellent addition to the canon. While the ending might be a tad romanticized, it still pleased me and left me hopeful that life would be better for the survivors.