https://nostarch.com/programmingopenscad <https://nostarch.com/programmingopenscad> And, I got this in an email from the publisher: Starting now to August 9, everything on nostarch.com <https://nostarch.us4.list-manage.com/track/click?u=7f22e9d06dac9fadee60e1e45&id=e04457bcff&e=566d6f0943> is 35% off with the promo code DEFCON29. Enjoy !! ______________________________________________________ Dan White : d_e_white@icloud.com “Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.” Bill Waterson (Calvin & Hobbes)