The poems gathered here, which trace the course of the First World War, are an extraordinary testimony to the almost unimaginable experiences of a combatant in that bitter conflict. Moving from the patriotic optimism of the first few poems (.fighting for our freedom, we are free) to the anguish and anger of the later work (where hope, with furtive eyes and grappling fists / Flounders in mud.), there comes a point when the reality of trench-warfare and its aftershocks move beyond comprehension: Sassoon knows this, and it becomes a powerful element in his art. As a book, the images have a cumulative relentlessness that make it almost impossible to read more than a few poems in one sitting.