"Over the past 30 years (that's how long this writer has been compiling these stats), a lot has changed, yet a lot has remained the same. Well-known authors dominated the fiction charts back then, as they do now, but, of course, the names are different. How-to and current events are perennially among the most popular nonfiction high rollers. What has changed dramatically is the unit sales required to be among our annual bestsellers, and the cost of hardcover books."