What are these?

Each of these icons are Social Bookmarking links and can be found at the bottom of every product page.

These sites allow you to bookmark, store and share information across the internet with  friends and like-minded people. They can also be accessed from any computer you happen to be using.

Though these sites are free to use, you are required to register. Once you have registered you can begin bookmarking. If a particular book then grabs your interest, simply click on the link to save the reference or share it with others!

As each site works slightly differently, please use the links below to find out more.

Del.icio.us
To register:
http://del.icio.us/register

For more information:
http://del.icio.us/about

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Digg
To register:
http://digg.com/register

For more information:
http://digg.com/about

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Facebook
Sign up:
https://register.facebook.com/r.php

For more information:
http://www.facebook.com/help/

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Reddit

To register:
http://www.reddit.com/help/registration

For more information:
http://www.reddit.com/help/faq

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StumbleUpon
To register:
http://www.stumbleupon.com/sign_up.php

For more information:
http://www.stumbleupon.com/aboutus.html

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Twitter
To register:
https://twitter.com/signup

For more information:
https://twitter.com/about#about