An e-book, short for electronic book, is a book publication made available in digital form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices. E-books are non-editable, reflowable books that are converted to a digital format to be read on any digital device such as computer screens, tablets, or smartphones. They are designed to be portable and convenient, allowing readers to store thousands of books on one device, which saves space and makes it easier to carry around a library. E-books are becoming more popular because they are less expensive to produce than printed books, and they can be accessed on multiple devices at once. E-books are often packaged as PDF documents so readers can share them. E-books can be read on devices such as computers, tablets, smartphones, or dedicated e-readers like a Kindle.