I read the one on microprocessors. It was a fun read and I learn something at the time, but I see it more as a gentle showcase of what the field you are reading is about, than anything else. I learned more from reading the AMD64 architecture programmer's manual but there were no chinese cartoons in it and hence not as fun as the other read. On other hand, I also read the mango introduction to Calculus and since I didn't know anything about Calculus, it was actually helpful, but I imagine, if I reread it now or any person, that knows about one or two about Calculus, it would be same as with the microprocessor manga.