I read the excerpt of your first book on the website, and particularly enjoyed the final paragraph:
One thing was very much clear that, the naive looking interface
was mere a rosy picture, hiding many unpleasant surprises in its bosom,
which we thought of unfathoming it to its fullest.
I've never heard a C++ interface described as a bosom!
I think you should rename the book to "Fifty shades of Boost"!
~Erika