Do you use a research based database?
Have you heard of Citavi? Does your uni library use it, or another research database?
Here's Citavi's address:
citavi.com
I use the Free (English) version and find it absolutely excellent for research purposes.
There are a number of free email lessons that you can tick the box for as well.
Citavi has soo many uses - and it captures not only ISBN info, but also videos and cd's and dvd etc.
The thing is with the free version, you can have as many projects as you like, but only 100 files per project - which isn't a problem for me.
Give it a try and see what you think.