Changing File Name?

Hello Everyone,

I just added a 6 pages having to do with Books. All pages are still PR=0 but
are being indexed.

I am #1 for Human Factors Books but am trying to increase the keywords:
Ergonomics and User Interface Design.

My files are now named on the order of
http://www.usernomics.com/human-fact...ce-design.html .

Would there be an SEO benefit to re-naming the files to something like
http://www.usernomics.com/books-user...ce-design.html ?

Thanks a lot,

Bob