Hi there! My name is***** am a computer professional with over 15 years of experience with both Mac and Windows computers, software, phones, tablets, e-readers, and printers. i see that you have been waiting for help for quite some time. I am sorry about that. It would be my pleasure to assist you with this.
On your ipad, in the Kindle reading app, from the Home screen of the app, try to locate the book that you purchased. Tap on it to download it to the reading app. You should be able to do this even if you previously sent it to your computer, as long as the reading APP is set up to use the same Amazon account that you used to purchase the book. Please give that a try and let me know the results.