Fiction by Ken Follett.
This is the sequel to Fall of Giants, which I read and loved recently.
As you can see, it is clearly marked on the cover "BOOK TWO OF THE CENTURY TRILOGY," so that everyone knows it is part of a series. This is how it is supposed to be done, folks. Publishers, PLEASE take note.
But I digress.
This story centers on World War Two, which is probably the best setting in history for a novel. The Nazis represent such a quintessential evil force, it just makes for great literature.
Still, this story manages to humanize everyone, showing all sides pretty equally. It's really a wonderful story, especially the audio version!