WorldCat

WorldCat is an online information network that lets you search for material (eg books) and see where they’re available around the world. Put anything you like into the search bar and see what pops up, or narrow it down to find exactly which library around you offers exactly what you need. It will tell you the closest copy of that textbook is 1000 miles away, if that’s the truth.

http://www.worldcat.org/

Overall, it’s probably one of the least cute yet most useful cats on the internet.

WorldCat