I don't want to reinvent the wheel with so much information available on the Internet. Here are some links that I have found. Just click on them.
That should help you get started. You can join several altered books Yahoo groups. They have swaps and round robins. There are several good books about altered books. I will work on mine and post it. I will also look back into my blog - near the beginning and link to that so you can see my altered books.