Rob Smith wrote: > Is there some MASTER database for ISBN that I can run queries off of? Depending on how you want to query (what keys you want to search on), you have a number of options. What you want to do is connect to a public web service to do your query. Samples found on google (serach: Web Service ISBN) a 3rd party web service, by ISBN http://www.perfectxml.net/WebServices/SalesRankNPrice/BookService.asmx Amazon.com's web service, more complex http://www.devx.com/Intel/Article/17089 Steve