In 1917, Thomas, a thirteen-year-old coal miner seeking his missing brother, James, joins the Claykickers, who tunnel beneath the battlefields of the Western Front as they learn to be men.

• ISBN: 9780374309039
• Published: 2019 , Farrar Straus Giroux
• Themes: boys and men, Friendship, Military and war, Soldiers and the military, World War I
• Descriptors: England (UK), Europe, Historical Fiction, Intermediate (ages 9-14)
• No. of pages: 320