I don’t often run sales on the MacSparky Field Guides. Instead, I price the courses so, in my opinion at least, they are always good values. Nevertheless, I decided this year to make an exception. Through this weekend only, all of the MacSparky Field Guides are $10 off. That’s the biggest discount I’ve ever offered. So if you’d like to get better at something nerdy on your Mac or iPhone, now’s the time to jump on board. To get the discount, just scroll to the bottom of any course (or press the enroll button at the top) and select the Black Friday discount price before check out.