The idea behind the Online Book Club is to expose you to sample chapters from new books, and maybe you'll discover some books you like. You'll get a new sample chapter by email each weekday, from a new book each week. There are different book clubs for different types of books (fiction, non-fiction, mystery, teen, business, ...), so you can sign up for your favorite category and read sample chapters from books you might actually like.
Read the sample chapters in your email each day, and if you like one of the selections, you can come looking for it at the library. It's a great way to find out about new books!