You might be interested in previous threads on Operation Overlord:

#General Information

Allied Planning and German Weaknesses

• Marshall, allied planning and Normandy - 5 comments, over 10 months old.
• Despite its small size, this thread gives a wealth of information on the production, planning, and politics enmeshed in bringing about Operation Overlord.
• How did the Strategists of D-Day know how many troops to send? - 11 comments, over 1 year old.
• One user in this thread discusses the invention of American tactics for Operation Overlord out of whole cloth by the planners talked about above and the ramifications it had for the landings.
• How could D-Day ever work if the allied stumbled upon so many fortresses build into the beach? - 17 comments, over 10 months old.
• The respondents discuss the specialized Allied armor used in the landings, the extensive bombardment that preceded the landings, and how the lack or ineffectiveness of these two factors which made Omaha Beach much deadly than the others beaches.
• Would the majority of the American soldiers on D-Day have been raw recruits? - 7 comments, over 1 year old.
• This commenters here talk about how experienced and inexperienced personnel were distrubated in American ranks by planners for the landing.
• Did the Allied Forces have complete air superiority over Northern France during D-Day? - 53 comments, over 2 years old.
• The commenters here give a rundown of the material, personnel, and logistical constraints that afflicted German forces on the eve of the invasion.

Allied Location Selection

• D-Day invasion: Why did they select those beaches for the amphibious assaults? - 11 comments, over 9 months old.
• The commenters give links and short summaries of online sources and also discuss the distribution of air cover throughout Europe during the invasion.
• What were the benefits and potential downsides of selecting Normandy as the invasion point of France in WWII? - 3 comments, over 5 months old.
• In addition to discusses the advantages and disadvantages of the Normandy invasion, a commenter in this thread also gives a short summary of the Western Allies' military and intelligence operations that supported and allowed for Operation Overlord's success.

Allied Counterintelligence and German Preparedness

• When and how did the Nazis find out they were being or were going to be attacked at Normandy on D-Day? When did they learn of the true scale of this invasion? - 12 comments, over 1 year old.
• Despite the title, this thread doesn't really go into the German side of the issue and instead focuses on the large scale Western Allies' counterintelligence operation that preceded the invasion.
• Why did the Germans believe the Allied invasion would take place in Calais, and not Normandy? - 7 comments, over 7 months old.
• This thread discusses various locations that the German's believed the Allies would land at due to both geography and the Allied counterintelligence campaign.
• How did the Allies "hide" all the ships from German reconnaissance? - 2 comments, over 7 months old.
• Despite the title and lack of the comments, a commenter talks about the effects of attrition on German air forces in relation to their reconnaissance capabilities.
• How much warning did Germany have of the D-Day invasion? - 11 comments, over 6 months old.
• The commenters here give a breakdown of the German intelligence picture in the immediate runup to the invasion as well as a chronology and analysis of the actions of German commanders in France before and during the invasion, most notably Erwin Rommel.
• Do we have an account of Hitler's personal reaction to the D-Day invasions of Normandy? - 11 comments, over 1 month old.
• The commenters mostly discuss the reaction amongst German forces in France and conclude with the Hitler's unimpressed reaction further down.

Plans in the event of Operation Overlord's failure

• What was the back up plan if d-day failed? - 54 comments, over 5 months old.
• The topmost comment gives a detailed summary pulling from both primary and secondary sources while a top level comment below it spurs a discussion on a counterfactual scenario on if the German forces could have defeated the Allied invasion.
• Were there contingency plans in place in case the D-Day invasions had failed? - 8 comments, over 8 months old.
• The commenter here discuss the counterfactual of the Western Allies' failed invasion while the Soviet forces on the Eastern Front progressively push through Europe.

Miscellaneous

• How was D-Day (or Operation Overlord) different for each of the Allied Forces? - 14 comments, over 1 year old.
• This thread gives a summary for most of the beaches and then answers questions such as the origin of the term "D-Day" and the necessity of attacking all of the beaches (particularly the infamous Omaha landing).
• Invasion of Normandy WWII significant areas? - 3 comments, over 2 years old.
• This thread summarizes several Canadian contributions to the operation and cites a variety of book sources on the matter.
• What was the French contribution to D-Day? - 4 comments, over 1 year old.
• This thread discusses French contributions of the Free French Forces' conventional naval and ground units snd the unconventional French Forces of the Interior during fighting in Italy and Operation Overlord.
• How much of a role did battleships play in D-Day? - 4 comments, over 1 year old.
• As the title says, the commenters talk about naval fire support during the landing and also give a quote from the German "Commander in Chief in the West" about its effects on German forces.
• Operation Overlord - 6 comments, over 2 years old.
• Various book sources are given here, including the US Army's official history which is available online.
• German fortifications in Normandy at the start of the Invasion of Europe, 1944. - 11 comments, over 1 year old.
• The original poster asks for books to read about the Atlantic Wall and commenters oblige them.

I'm not sure the exact logistics of the scheme, but the Allies had left wooden tanks and the like along the coast line at Dover, leading the German's to think that the invasion would happen there. Alas, they did realise, but we launched before they could move their armoured divisions from the north slightly south. Also, straight after D-Day there was a storm. The Germans thought that we wouldn't risk an invasion of choppy seas and without men dropped behind the line. But, we did. The day before the storm was 6th June and we fucking launched and mugged them off.