I've been benefiting from these books for years. If you use Mac, iPhone, iPad etc do yourself a favour and learn something new. The Take Control Books Black Friday Sale 2024:

Black Friday sale, which runs through Tuesday, December 3 at 11:59 PM CST. For this one-week period, 24 of our books—that’s half the titles currently in our catalog—are half off. No coupon codes or special links are required; just visit our catalog page and look for books with a “Sale” tag (regular price crossed out, sale price next to it).

@markstoneman Even when I think I know a lot, I still manage to learn something useful from the Take Control books. And what I do already know is largely thanks to previous editions.