Atlas Shrugged
One Second After
The Elegant universe
Jefferson and His Times (All 6 volumes)
Undaunted Courage
Nothing Like it in the World
Pillars of the Earth
World Without End
Undaunted Courage and Nothing Like it in the World are very good.
I would add: Pegasus Bridge
D-Day, June 6, 1944: The Climactic Battle of World War II
Citizen Soldiers: The U.S. Army from the Normandy Beaches to the Bulge to the Surrender of Germany, June 7, 1944 - May 7, 1945
Not a must read but suggested reading. The Earth Chronicles by Zecharia Sitchin especially The 12th Planet and Genesis Revisited. That is if you are interested where humans, as we are today came from, but not life as such as this is an altogether different story.
It also may offers an explanation of some of the UFO sightings, as I do believe our Custodians or the Gods of Antiquity still keep an eye on us for obvious reasons. You may refer to an article which appeared a few days ago on FR UFO incursions on nuclear sites and if you cant find it you always can Google it.