What to read after En L'Air (WWI Centenary Series)?

""This book is the amazing story, told in his own words, of an American who fought in the French Army from the Second day after the war was declared in 1914 until the present time. His service included also special duty on the Russian front. The title, ""En L'Air,"" familiar to many American readers, is the command given aviators in the French Army to leave the ground on the duty to which r=they have been assigned."" This book is part of the World War One Centenary series; creating, collating and reprinting new and old works of poetry, fiction, autobiography and analysis. The series forms a commemorative tribute to mark the passing of one of the world's bloodiest wars, offering new perspectives on this tragic yet fascinating period of human history. Each publication also includes brand new introductory essays and a timeline to help the reader place the work in its historical context.