The Yi Jing (or more commonly known as the I Ching) is considered the oldest book of divination . It is used to help gain insight and guidance to a problem or situation. The answer is projected as an image of the current situation as well as an image of how things may change in the future.
"Yi" means change and "Jing" means canon or book. This is why the Yi Jing is also referred to as "The Book of Changes".
There are 64 hexagrams in the Yi Jing that consist each of 6 lines. The lines in a hexagram are either solid (yang) or broken (yin) and are arranged in significant sequence. There are two ways to divine a hexagram about your situation. The first and most popular method, is the coin toss. The second, is a traditional method using 49 yarrow stalks.
To read more about the Yi Jing and learn how to ask your question and divine a hexagram, go to http://www.astro-fengshui.com/iching/divination.html
The Complete Idiot's Guide to the I Ching ISBN 0-02-863979-0 is highly recommended if you are interested in learning more about this amazing art.