If your books are in Itunes..open itunes on your Zipad. If your books are formatted fr Kindle, get the Kindle app. Maybe you can attach the book files to an emil to yourself, open your emil on Zipad and the downlad them, you will need to set up /sync your iphone. Ipad email together. Make notes to take with you. Bring your Itunes passwords with you too. They will ask for it.
Sandy