This book has some things in common with the other "Day by Day" series. It has some color maps, many interesting photos, informative sidebars of key personalities, weapons, tactics etc. Its different to all the rest in the series in that the timeframe covered is short allowing the author to expand comments for each entry. Mr Hall has done a nice job delivering more fuller responses than you usually find in this series.
The book begins coverage in Dec 1943 and works its way to June 6th. Prior to D-Day, the author describes the planning stage of D-Day including Operation Neptune, Fortitude, as well as Overlord. On the German side, the author states some of the items they did to prepare for the anticipated invasion.
On June 6th, the author takes us through almost on a hourly basis the events that happened on the five major landing sites.
I enjoyed the book but felt a higher rating would be inappropriate when you compare it to more comprehensive Chronologies by Raymond Bluhm, Keith Dickson, Mary Williams or Jurgen Rohwer.
If you're wanting to learn about Operation Overlord and the events of D-Day, this would be a good place to start.