Hi!
My name is Tomasz Kustra, and I am from Poland.
I am interested in this project.
If you have plenty of ISBNs than probably it would be better if it run in background on server, launched from cron.
Amazon aPI limit number of request per time, and ech request limits number of ISBN that you can ask of, so it may take some time, therefore it will be better if it run in background.
I have experience in gathering data from Amazon, last one completed or in progress you can see here:
Amazon:
https://www.freelancer.com/projects/php/Amazon-Competitor-scrape-10086328.html
https://www.freelancer.com/projects/php/need-someone-can-build-kind.html
https://www.freelancer.com/projects/php/Amazon-grabber-list.html
https://www.freelancer.com/projects/php/PHP-CENTOS-Scrape-amazon-Data/
https://www.freelancer.com/projects/php/Amazon-Product-Information-Pull/
https://www.freelancer.com/projects/Javascript/Build-script-that-retrieves-the/
I am experienced freelancer, you can see ma resume on Freelancer.com here:
http://www.freelancer.com/u/tomkusvw.html
And my another, unused now, account:
http://www.freelancer.com/u/tomkus.html
As you can see I have successfully completed few similar projects.
I am sure, that you will be glad of my work if you choose me.
With Best Regards
Tomasz Kustra