"Jean Dartemont, the hero of Gabriel Chevallier's autobiographical novel, enters what was not yet known as World War I in 1915, when it was just beginning to be clear that a war that all the combatants were initially confident would move swiftly to a conclusion was instead frozen murderously in place. After enduring the horrors of the trenches and the deadly leagues of no-man's-land stretching beyond them, Jean is wounded and hospitalized. Away from...