I wrote a couple of short math books on a related topic: http://hilomath.com/ http://hilomath.com/ They're different in that they focus on more abstract math -

I wrote a couple of short math books on a related topic: http://hilomath.com/ http://hilomath.com/ They're different in that they focus on more abstract math - algebra and calculus. In other words, how to solve algebra equations mentally, and how to do calculus operations mentally. Most books I've seen about "mental math" are actually about "mental arithmetic". While I personally see value in it, there is more to math than that. Actually, I'd love any feedback people may have - both from an educational standpoint, if you have taught algebra and calculus; and from a business standpoint - the two math books are the two products I have now, and I'm thinking about how to better monetize it all, perhaps developing a larger study course kit. Thanks in advance. (By the way, let me say right away that I'm not claiming to be unusually talented at math, because I'm not... just a typical engineer. Probably most people with an engineering or hard science degree (mine is in physics) will not find much new in the books. I just examined how I and some others solve algebra and calculus problems mentally, and attempted to explain how to replicate it.) EDIT: see also http://blog.hilomath.com/ http://blog.hilomath.com/