|John Everett Millais, "The Hidden Treasure"|
In the meantime, I have received additional information about the book. The title is till tentative, so I won't say anything about that, but here are some other estimates about the book's publication:
The volume is scheduled to appear in February 2017. It will be approximately 304 pages, will be a paperback, and the estimated price is $27.99 (cheap!).
Here is the Table of Contents as it now appears in the manuscript so that you can see how wide-ranging the interpretations are: