Ebook: Calculus for the Utterly Confused

I graduated from college about 13 years ago. After working in the industry for around 9 years, my math is completely gone. When I decide to go back for a higher education, I found this good easy to read and it helps me refresh my memory in particular the basic concepts. It gives just enough amount of information for me to get my feet back on the ground. It lists useful laws, formula and when combining with examples, everything starts to make sense!