Hi: This was my first project that I had in mind after reading the Perl book Spidering Hacks. http://www.amazon.com/exec/obidos/tg/detail/-/0596005776/

I was able to create the small Perl program above that searches for ISBN #'s in sequential order. It then emails me the results to my blogger website.

The blogger website is automatically updated by the Perl script. The Perl program searches Amazon for valid ISBN numbers. It returns the results with my Amazon.com Associates ID embedded in the link. The list of ISBNs on my blog is in sequential order. The spider searches for pages that do not return 404 html errors .
For me, I like checking the blog site. It's interesting what publishing titles are grouped close together by ISBN. My next step is to add content to the links (author, description, customer reviews)

The output for the program can be seen at:

http://amazon-electonic-deals.blogspot.com/