Started writing in 2005, after 20 years working for a living...In fact, writing is work, of course, but I mean that I like it a lot more than the 9-to-5 grind of my office job (research engineer for a multinational aerospace corporation).
Ingenium was my first book, and I guess it shows, but I still have a great fondness for it. I was approached out of the blue by the editor of Johns Hopkins University Press who had seen a bunch of my published papers on historically important machines--he thought they could form the basis of an interesting popular science book. So I wrote it; the reviews were kind. I've recently completed my tenth book.
Excellent and very entertaining book. It is too bad that the Kindle edition contains such incompetent proofreading when it comes to any math formulae. Truly abysmal. Pi is shown by "7T"?
Good blend of approachable engineering, photos & text and mathematics & fundamental principles. It was the perfect level for an aerospace engineer to get a better technical feel for the basics of bridge, dam & sky scraper design.