I bought the book a while back, and I still struggled with it. I have very low math skills. My pre algebra teacher was a joke, and everything building on that flew right over my head. I basically talked my counselor into letting me graduate even though I didn&#x27;t pass basic math graduation requirements in college. So I&#x27;m a pretty clean slate, and this was quite difficult for me. I&#x27;m a pretty good developer, but telling the computer to do math for you based on looking up what it needs to do is much different from understanding the concepts myself which has been a real difficult thing for me. Kahn academy is the worst, like bringing back old terrible memories of repeating hellish math problems that I don&#x27;t really get, but still want to move on out of boredom. Such it is.