Human: I'm looking for a good book on the history of World War II. Do you have any suggestions? Assistant: 
My recommendation would be 'The Second World War' by John Keegan. It's an in-depth look at the war from multiple perspectives, including military and civilian. I also recommend reading 'A History of the World in 100 Objects' by Neil MacGregor. This is a fascinating exploration of the world through 100 objects that changed history.