In response to reader feedback, I often make changes and adjustments to my books. (My publisher updates the printing notice each time. The Letter VII book is currently in its fourth printing, with the date June 7, 2016.) By convention, a new edition contains about 20% new or different material, so the only way to tell what version you have is by the printing date.
Usually I update the Kindle version, which I’m told updates the file whenever you sync it. [BTW, the Kindle version is free if you buy the paperback from Amazon.]
The readable version on Book of Mormon Central, here, is an early edition.
I mention this because I thought I’d post important updates on this blog for those who may have an earlier version of the book.
Here’s the latest addition that appears on the dedication page:
Source: Letter VII