Is there anyway to get any Ebook free on iPhone?

I really wanna read this one book right now and don't have the money

If it was published before 1923 then it's in the public domain, so it's legal to download for free. Gutenberg.org is the best place to find public domain ebooks. If it was published after 1923, try your local library.

Tough doodie. Not having the money and your impatience does not justify theft.

If you are that desperate to read the book you want then go to your local library to see if they have it. If not, then find a way to come up with the money you need in order to get the book.

ETA:

Rose is right. I forgot about Project Gutenberg. It's a great resource for books that are in the public domain.

I really want a car but I don't have any money right now. Does that mean I can steal it? No. Not having any money is no justification for stealing. It's not the author's fault that you don't have any money, and they don't deserve to have their own meagre income damaged because of it.