"online book " 的定义和意义

What is an "online book"?

An online book is a digital book that can be accessed and read through the Internet. It is available in various formats, such as PDF, EPUB, or through dedicated reading platforms and apps. Online books offer the convenience of reading on various devices, including computers, tablets, and smartphones, and often provide features like adjustable text size, search functions, and hyperlinks. They can be purchased, borrowed, or accessed for free from various online sources, making them readily accessible to a wide audience.