Sorry I guess now having reread it, I wasn't too clear.
I have a few pages from my text book that I have to download from online. When you're on a specific page, you can save that page. It comes out as .html or htm I guess files. I know that Firefox, Safari, etc can read them, but when I open more than one of these files, it opens up multiple windows. This is fine for 1-2 pages, but I have over 50 of these. 50 Windows is just a bad idea. I was wondering if there was a program to either open up it like a book, or maybe even 50 tabs in Firefox (I know you can drag/drop but is there a faster way to do this?)