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Input: Combining his twin passions of painting and working to help military veterans , former president George W. Bush 's new book aims to help those who have served our country in their transition to civilian life . 
Bush appeared on TODAY Monday with a special group of four veterans for an exclusive interview about his new book , "Portraits of Courage : A Commander in Chief 's Tribute to America 's Warriors ." 
The book features paintings by Bush of several veterans and an in-depth look at their stories of perseverance after suffering from visible wounds on the battlefield as well as PTSD and other invisible trauma . 
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"It starts with -- and this is why these vets are very important -- vets saying , ` I 've got a problem ," ' Bush told Matt Lauer and Savannah Guthrie . 
Bush will donate proceeds of the book , which can be pre-ordered online , to the George W. Bush Presidential Center , a non-profit organization that helps post-Sept . 
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Army Sgt. Major Christopher Self , Army First Lt. Melissa Stockwell , Army Sgt. First Class Michael Rodriguez and Air Force Master Sgt. Israel Del Toro appeared alongside Bush to speak about their lives after the military .

George W. Bush book ` Portraits of Courage ' honors veterans . 