'Hitlers War' by Harry Turtledove is his latest book and the first of a reported Trilogy. It just arrived today here, and I am anxious to start reading it.
Turtledove has written several alternate history books - two about a Japanese Invasion of Hawaii, for instance - and this is his latest endeavor.
The Synopsis: Neville Chamberlain does NOT sign the Munich Accord. What if Hitler had acted rashly, before his army was ready - would it have doomed him faster? Turtledove uses several view points (American Marines in China, the Abraham Lincoln Battalion in Spain, etc.
I think it will be a good read like his other novels.
Amazon.com: Hitler's War (9780345491824): Harry Turtledove: Books