The U.S. Army's 1st Infantry Division, aka "The Big Red One", fought in some of the toughest European battles of World War II. This book claims to be about the 1st during the D-Day invasion at Normandy, but that only takes up about half the book. The first third of the book recounts some of the 1st's action in North Africa and Sicily and the narrative bounces back and forth between the 1st and the big picture of the pending invasion of France. Personally, I think this part of the book could have been written better and in a more linear and fluid way.
However, once we actually get to D-Day the book takes off. Using a plethora of personal recollections from members of the 1st and from other units, the assault on Omaha Beach is retold in graphic detail. It's not hard to see why this was such a chaotic fight and how precarious the Allied foothold on Omaha was. Hands down, the D-Day recollections are the best part of the book--truly outstanding oral history.
After the first few days of the Normandy invasion, the book starts to get into a more generalized account of the 1st Division's combat in France, Belgium, the Netherlands, Germany and Czechoslovakia. There are still several personal accounts, but nothing like the part on D-Day.
At the time this book was written, there might not have been many accounts from 1st Division soldiers about D-Day, so claiming this is the "untold story of the Big Red One on D-Day" probably has a ring of truth to it. If the author had just chosen to focus on D-Day, I think this would have been a better book, but instead he spends quite a bit of time on background and planning, and then another fair chunk on a less-detailed narrative of post-D-Day action. Even with this criticism, I still think this is an excellent book on D-Day and a fine tribute to the men of the Fighting First.