I have a Easton Press Collector's Edition
Leather bound
250 + books
Mint condition

Can someone tell me were I can find information on these books,history,value etc.
Thank you :)

Call the reference desk of your local public library, and tell a reference librarian what you are looking for. If that library doesn't have the information on site, they will obtain it from another library. If it's a price guide, for instance, they will also tell you where it is, so you could drive there yourself.

Yes, calling the reference desk at a library would be a good idea. You could also go to the Easton Press site, Easton Press Online Catalog or even perform the following search, Easton Press Collector's Edition - Google Search because listings for those editions seem to be all over the Internet.