I love Erik Larson's historical nonfiction books. I finished reading Dead Wake the other day, and it was one of his better ones.
One thing I really enjoyed was the way Larson delved into the people's lives during this tragedy. For example, President Woodrow Wilson was depressed and then courting a woman he would later marry... that is, he was distracted.
The British government didn't provide military escorts for the large luxury ocean liner when it entered the channel between Ireland and England.
So many things happened that could have eliminated or reduced this tragedy.
I don't remember reading about this bit of history before and found it fascinating.
Dead Wake: The Last Crossing of the Lusitania