Phil, a worthy project, and hope you can elaborate on content.
What is the time frame, eras encompassed?
Are African American teams outside the Negro Leagues covered?
What items are highlighted, featured?
After completion, what were some of the more surprising results from your research and evaluation?
I realize that many of these things will be summarized in the book, but am mining for pre-print info.

If there is a pre-order list put me on it.
Respectfully, Ty