Is there a quick way to lock all pages in a workbook at one time?

From: teckie (teckie_at_discussions.microsoft.com)
Date: 10/29/04 

Date: Fri, 29 Oct 2004 14:27:03 -0700

I have several wrokbooks that have 20 to 50 pages each. I want users to be
able to view or print the informatin, but not change the data. Any
suggestions on how to secure all the pages at one time?