This page lets you browse Amazon's catalog via their 'people who bought
this book also bought these' functionality.  You can start with a keyword
search (like author, or subject, or title), below, or, if you have the
ISBN, you can start with that.

<!-- After getting 10,000 hits in 4 hours from one IP address, I need to
reconsider this cgi. -->

<p>
<form 
action="/cgi-bin/amazon/keyword.cgi" method="post">
<input type="text" name="keyword">
<input type="submit" value="Keyword Search">
</form>
<p>
<form 
action="/cgi-bin/amazon/asin.cgi" method="post">
<input type="text" name="asin">
<input type="submit" value="ISBN Search">
</form>