Hi. I am someone who would like to begin to understand the mathematics behind physics. I have forgotten much of the math that I was taught in high-school, not that I paid much attention at the time, unfortunately. I ran across the book The Mathematics of Relativity for the Rest of Us which looks great, but scrolling down, I found that apparently the second paragraph on page 5 contains erroneous information. I was wondering if anyone here has read the book, and whether or not this is just a mistake or is the text full of errors? Also, what you may have thought of the text for someone that is basically a sixth-grader when it comes to math, and I am afraid I am not exaggerating by too much. I would prefer to learn the math in an applied manner, as solving a bunch of equations with no visible real world applications is one of the reasons I didn't pay much attention in high school. Not that the payoff isn't worth it; I'm just afraid I will not be able to stay motivated.