The Inverted Book Club
Some readers pick up a reader and read it cover to cover, without straying into other books. Normal book clubs are ideal for such people. It allows them to commit to reading one book per month, and discussing it with others.
People like me prefer to buy plenty of books, and start reading one book before switching to a second, and then a third, and then a fourth. We read books as if we were watching two or three television series on TV. We watch an episode or two, and then we move on.