For those that enjoyed Unbroken by Laura Hillenbrand, try Flyboys, a True Story of Courage, by James Bradley. Bradley is the best known for his book, Flags of Our Fathers, a story of the flag raisings on Iwo Jima.
Son of a flag raiser at Iwo Jima, Bradley writes in Flyboys of the struggle of eight airmen shot down and captured in ChiChi Jima and the barbaric torture that ensued. None survived. Bradley tells of the dramatic plane crash survival and rescue of a ninth airmen - Navy pilot George H.W.Bush and a decision made by the former President that haunted him for years.
Unbroken, Flyboys and Flags of Our Fathers are must reads for any WWII enthusiast or any one who wishes to learn of those who came before us and their heroic efforts to make this world a better place.