An Easy Course in Using the Hp 12C and Other Hp Financial Calculators by Chris Coffin, Ted Wadman (1984, Paperback)

This was the book I first used to learn how to use the full functions of my HP 12C; as it is so much easier than reading the handbook which comes with the calculator. The easy course in using the HP 12c not only gives real life examples to understand but illustrates all the steps in a very easy and logical method anyone can learn. I quickly learned about registers, interest calculations, and amortizations. There are so much more uses for this calculator but I only needed to understand some simple finance stuff. I keep it handy on my on my bookshelf for quick reference.