Wilful Murder: The Sinking of the Lusitania - Diana Preston

We Americans tend to forget WWI. There still isn't a memorial for it in DC yet, for instance. While the Lusitania may have gotten a bump from Dead Wake: The Last Crossing of the Lusitania, Preston's book places the sinking into the narrative of WW I. In many ways, her book is better than Larson's, though she lacks his narrative style, which is engrossing. Preston presents a more complete picture. If you liked reading Larson, you might want to give this a try.