I was too naive to think that if I do not provide my credit card information, nobody can charge me for anything. I was wrong. I entered the sweekpstakes that came in mail. It was simple no purchase necessary sweekpstakes. All I needed to do was to put the sticker and mail in the envelope, so I did without reading the fine print. A month later, Sky Guide was mailed to me and I tossed it in the garbage thinking it was a junk mail. A few months later, I happened to notice a charge on my American Express statement. I was charged $69 for the guide I found no use for and no invoice came with it. I think this is a tricky marketing practice. Folks, be sure to read the fine print.