First things first go to google.com and the type in google books in the search box. Click on google books it should be at the top. Once you get there two boxes one says researching a topic and the other should say shop for books. You want to click on the blue link at the bottom of the page that says About Google Books (next to privacy policy). From there it will take you to a page that says About Google Books on the far left side of the screen you will see a list of options select Join now. After you have joined then follow the instructions on how to upload you book it needs to be converted to PDF format before you can upload it.
Nook will usually have your book processed and up for sale in about 24 hours however Google Books takes about three weeks *sigh*. Wish someone would have told me that in the beginning. If I have know I would have started working on this a lot sooner. Now about Ipad, it is possible to sell your self published book through them however you need an account with them. I am still working on getting my book in there app store. Once I figure it out I will let you know how to go about doing it. So now it's back to work. I imagine I will be getting a lot more work done in a couple of weeks as the kiddies return to school (color me excited.) It has been a long and eventful summer.