Good!,
I could takecharge of the text. In fact it can easily be extracted from my book "Historia de la Honda", adapting the text to the new approach and perhaps limiting it to the part of old and medieval history, that I think is the most interesting. Other aspect would be the work of research on apparel and auxiliary weapons, etc, to make a trustworthy reconstruction of the slingers and the epoch. I think that this research of historical reconstruction could be done by both of us, investigating texts and analyzing illustrations of other authors. We would review the illustrations you have made before to adapt them, if necessary, to a particular text. Perhaps the book could include 30 or 40 illustrations and I would make a first version of the text in English and you would be in charge, directly or through another one, of its correction and adaptation to English style (my English, you know, is not good enough for direct publishing).
In order to publish the book( in English at first, and aftewards to others languages
) it would be necessary to find a publisher, but first of all we have to make a part of the book that serves like example to show to the publisher. We could begin working on particular historical passages and to go thus letting grow the book little by little.
When do we began? What about a title like "The sling, a historical weapon" or something like that?