Very cool - thanks for posting this.
I’m currently reading Leonardo The Artist and The Man ISBN 978-0-14-023175-5.
I wouldn’t say it’s a “must have” book but it’s pretty good and I really appreciate the author’s approach to the topic and writing style.
Not sure how many years of lurkdom I’ve had but had a heck of a time remembering my password just to comment here.
Appreciate the effort. There's a nice museum in Vinci, Italy, with working displays of Leonardo's inventions. You can visit it HERE.