What Am I Doing?

My friend is writing a book.
I am helping her.
I know nothing about writing a book.

What am I doing? 

Basically, I am her editor/proofreader right now. She is writing a testimony of the amazing miracles God has performed in the life of her family over the past 10 years, to which I have had a "front row seat", so to speak.  She wrote the first draft, and now I am going through it and not only correcting grammar and phrasing mistakes, but also cleaning it up, taking out parts, rewriting sections, etc.

I'm feeling a bit over my head, but my friend called today and said she and her whole family were really excited by the changes I made in the Introduction and first chapter. So I'm feeling that at least I'm going in the right direction with it.  Whew.
There is a bit of a time crunch to get this done as soon as possible and to the publisher so that she can have it ready for a conference she is speaking at in a couple of months.
Gulp!

I will fill in more details later, but if you happen to think of it, I'd appreciate your prayers.