Gilbert Morris 
Hope Takes Flight (American Century Book #2) 

Just years before America witnessed the turn of the century, the three eldest Stuart children left their home in the hills of Arkansas to pursue their dreams in the land of opportunity. Now they are back for a family reunion at the humble home they left years ago.In an unforeseeable turn of events, their visit is cut short when Lylah and Amos are required to return to the city as the world edges closer to war. Within months they find themselves and their brother Gavin deeply involved in the war efforts, but not in the ways they had ever expected. And as the conditions in Europe worsen, they must face a startling reality: before it’s all over, the war could claim the life of one of their own. Will the Stuarts survive these tumultuous times and return to their family safe and sound? Or will World War I forever change the lives they know?