For centuries, people have considered books to be dear friends and fascinating companions that are capable of opening up doors of knowledge and expanding their understanding of the world on many levels. For a number of years, audio book versions have been a popular alternative for people who can't always find the time to read everything they wanted to read and so audio books online are the ultimate in convenience for audio book lovers.

One of the best things about audio books in general is that they give people the chance to avail themselves of the knowledge that is contained within the covers of a treasured tome without having to crack open the cover. In today's fast-paced world, people often don't have the luxury of being able to carve out enough time to read a lengthy novel, no matter how great a masterpiece it might be. But the same busy person can download audio books, load them onto their audio book player, such as an iPod, and listen to the MP3 audio book while they are engaged in other activities.

There are many activities that people can engage in that lend themselves very nicely to being able to take advantage of the audio books online. One of the best ways that people make use of an MP3 audio book that they have downloaded is during the time when they are in their cars, either running errands, commuting, or when stuck in a grid lock of traffic.

Driving, commuting on a bus or train, or even commuting on foot or bike, gives people a block of time on a regular basis that is perfect for listening to audio book downloads. At the same time, these same activities do not lend themselves to reading because it is difficult to hold a book and read. But, with audio books that are available on the internet, which are so plentiful and widely available, the commuter can download a new audio book as soon as they finish one and have an unending supply of wonderful material to listen to and enjoy.

There is a vast array of audio books these days and there seems to be more and more websites cropping up with each passing month, which continues to expand the selection that people have. No matter if you want to learn a new language, brush up on negation skills, learn history, or just want to be entertained by a best selling book that has been made available in audio format, the choice is wide open and you can find audio books on virtually any topic.

While many of the audio books online are available from audio book clubs, audio book rental services, or audio book retailers, there are also many free audio books that you can find on various websites. Public libraries and sites that have collected public domain titles have a huge number of audio book downloads that you can get without paying a penny.