I will tell you one thing. AdSense is the most incredible concept of money making in the world. But as an advice, be patient if you will setting up an adsense account, Google Adsense will MAKE you earn money, but not tons of money the first day you begin. The most important thing , and believe me, the most important thing for earning money using adsense is to have an interesting web-page, site or blog and to have too much visitors to your page, the equation is simple, more visitors, more opportunity to earn money.
There are two or three excellent and affordable books you can buy about mastering AdSense, search for them in Google, look for Joel Comm's books, I consider him as one of the best authors of Adsense book on the market, he really is a "Guru" in the topic.