PUNTA GORDA, Fla - Author Michael Hirsh is telling the untold stories of more than hundred U.S. troops who helped liberate concentration camps in Germany and Austria.

The book titled "The Liberators: America's Witness to The Holocaust" features a first-hand account of what American servicemen encountered at the conclusion of World War II. It takes you from the beginning of the liberation through the end of the war in in May of 1945.

"The most bizarre notion off all has been this book has never been written", said Hirsh. 

Many of the Veterans recalled coming across "stocks of bodies like cordwood" and "skeletonlike survivors" in camp after camp.

Sunday also marked Holocaust Remembrance Day.

Many of the Veterans interviewed were in their 20s during the war and never told of their experiences before, "I'd ask somebody when did you first tell your wife or children about this? And they'd say I never told them about this, she's hearing about this for the first time listening to this interview", Hirsh told us.

More than dozen of the liberators Hirsch spoke with have since died.

The book published by Random House has already hit book shelves.