An audio book is a recording of the contents of a book read aloud. In the old times, audio books were usually recorded on tape and were only available in public libraries and bookstores. They were expensive and many popular books simply did not have audio recording. Audio books have traditionally been used as an educational tool to help children to develop their listening skill and vocabulary, and to stimulate their interest in reading. They have also been used for those who have difficulty in reading due to language skill or physical disability.

But things have changed in the past few years. Audio books are now available in many formats. Some are recorded on tape or CD and some as digital downloadable files. Most of the new book titles are now available in audio format. The popularity of portable media devices such as Apple iPod and best selling titles such as the Harry Potter series also help to increase public awareness and boost the sales of audio titles considerably in recent years.

Audio books are no longer expensive either. Many audio book clubs offer different membership plans for casual to avid readers / listeners. Like DVD / game rental, audio book rental service allows you to rent unlimited number of audio books per month for a monthly fee. For international listeners, you can download audio books directly into your computer and then upload them to your portable device. Many audio book clubs also offer free audio book download with free trial.

Today, audio book is no longer used as a teaching tool, it provides hours of entertainment to average people. You can listen to a memoir with the author reading out his/her own writing to you. Listen to a thriller with added intensity and emotion, or let your children listen to audio books as bedtime stories. When you are exhausted after a whole day work, you can relax on your sofa and listen to your favourite novels. Or, while you are traveling on a train, shopping in the mall, or waiting in the doctor's clinic, audio books can become your source of enjoyment in many different occasions.

If you are not keen on reading because of a busy lifestyle, or not being able to read due to some other reasons, an audio book would be a good choice for you. It provides an entertainment that is suitable for people of all ages, reading abilities and lifestyles. And better still, it is more affordable than ever before.