I posted a couple of months ago about a kids' history book that I'd been asked to write. Originally the subject was to have been Napoleon, but then it was changed to Alexander the Great.
Writer Tom Saunders pointed out to me in this very blog that Mr. The-Great was perhaps a little too fond of children for comfort. I reported this fact back to the publishers and the project was pulled. Now they've gone for Leonardo da Vinci.
Mr. da Vinci's activities were of course entirely confined to painting, drawing, and inventing the helicopter. (Oh yes they were, and there's an end to it.)