For anyone who's interested, I found a solution to the problem
I opened a free account at file den and uploaded my book there. Then took the URL and made a link on my website. When i enter the link in the safari browser on my iphone/ipad etc it gives me a page with the name of the file on it and in the top right of the screen safari gives you the option of opening it in iBooks.
At least it works for those devices. Now i have to figure out how to get it on Kindles and Android devices. Any advice would be appreciated.