There are books for absolutely everyone, with countless pages written on any subject you can think of - whether you're in to science, science fiction, religion, history, biographies of pop stars, factual works, fictional adventure tales, elves, demons, World War II romance novels - literally anything you can think of, the list goes on and on. There are books written specifically for children, with larger words, vibrant pictures and easy to understand concepts, usually with enough wit to keep adults entertained whilst reading them to their children.
In today's modern world, books don't have to refer to bound collections of pieces of paper, as they can be read on electronic e-readers. These devices allow the user to download the books of their choice and read them on the go, taking an entire library with them. Audio books are also available, which usually have a talented voice actor or TV personality reading the content of the book aloud to you. These audio books are perfect for long drives or commutes, where you would otherwise not be able to read.
If you're stuck for choice, you can buy a book all about buying books too. Some buying guides will point you towards a certain genre or type of book depending on your tastes, whereas others will outright suggest some of the more popular stories.