03-14-2015, 11:58 AM
I bought this book a while ago to bone up on my excel and modeling. I don't remember it costing $70 when I bought it, but I would say it's worth a few times that
http://www.amazon.com/gp/product/0071608...UTF8&psc=1
http://www.amazon.com/gp/product/0071608...UTF8&psc=1