interest

Some results in finance are non-intuitive. Simplistic logic leads to the wrong answer. OK, that was cheaper than buying this book.

If you want some examples from a number of areas of finance which demonstrate this observation, then this book is for you.

If you want to be able to solve any real problems, you'll have to take the next step and actually look inside a textbook for a first course in finance. Unfortunately, this step involves learning some mathematical analysis and finding your calculator. Davis' book only helps you understand that guessing is as likely to lead you to the wrong answer as the right one.... maybe more likely, since there are a lot more wrong answers than right ones.