Human: I've been hearing a lot about the e-book, but I don't know much about it. What is an e-book? Assistant: 
An e-book is a digital book that you can read on your computer or mobile device. It’s a type of electronic book (e-book) that is stored in a digital format and can be downloaded to your device for reading. E-books are becoming increasingly popular because they offer many advantages over traditional books, such as being more portable, easier to search and access, and having no printing costs.