What is a book? It used to be so easy to define, and until a few years ago the definition might have mentioned the word “paper”. Not any more. The e-book revolution has changed everything – and it’s hardly started yet.
Books are starting to include many of the things you may associate with finding on a web page, such as interactive images, video clips and sound. “Enriched format” is one term used to describe books like that.
Here is an example of the kind of thing that could become more common in “books”: click here.