The Button War by Avi is a historical fiction novel set in Poland during World War I, focusing on a group of boys who engage in a competition involving the collection of the buttons of soldiers. The story follows the protagonist, a boy named Patryk, as he experiences the war among countries as well as among his friends. The Button War has themes of loyalty, ambition, the destructive nature of war and the loss of innocence. I would rate this book a five out of five for its engaging narrative and insightful commentary on human nature. A book that is comparable to the The Button War is Lord of the Flies by William Golding, due to their common use of a group of boys and their rivalries. I would recommend this book to anyone who likes that kind of stuff. I recommend this book to middle-grade readers, fans of historical fiction and anyone interested in poignant tales of friendship and the effects of war on young lives.