How can I write a book using Microsoft Office 2003?

I would like to write a book. Are there any programs that help me do that. Can I download any 100% free software programs. No trials please.

How can I write a book using Microsoft Office 2003?computer protection

OpenOffice - it's a free word processing program. Won't help write the book, but has all the tools you need to do it on the computer.

www.openoffice.org

How can I write a book using Microsoft Office 2003?free antivirus download

If you have MS Office, then MS Word is for writing anything.