Okay, not as fun as saying 'Book 2 is submitted' but still important. Stewart was kind enough to review the book and add some excellent corrections. He also fact-checked a few things which means I need to make a minor correction to Book 1.
For some reason, the first batch of corrections never got saved, so I had to redo them. However, they are all fixed (until we find more) and the book is uploaded to Amazon for their review process. Thanks, Stewart!