Thank you everyone! You have solved my confusion. I had purchased the book, but the title on the outside (How to Fly the B-29...) threw me off. Now that I know what to look for, I found it quickly.
I'm planning to compare the original (December 1944, based on operations from Asia) and new (May, 1945) editions. LeMay wrote in early 1945 that there were a lot of problems with the first edition, although he did not specify what they were. Just skimming the second edition, it has a lot more detail.