Info on the limitations of bestseller lists from Michael Hyatt...
http://www.michaelhyatt.com/fromwher...stseller_.html
Basically, he points out that the bestseller lists only include some sales channels, and don't include mass market outlets. "But guess what’s missing? That’s right. All the mass market outlets like Wal-Mart, K-Mart, Target, Costco, and Sam’s and Christian bookstores (some2,300 storesor so). This is a big piece of the market."