Hi there and welcome
Can you please on the iPad go to the App Store and download the app Kindle
Once done, you can open it, register with your Amazon account and you can then access all your books you had on the Kindle.
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.