When you access an ebook from the Library Catalogue
and see the page You will need Adobe Digital Editions
select Get Adobe Digital Editions
Download the version of Adobe Digital Editions relevant to your device.
Screenshot shows option to download Adobe Digital Editions from App Store to iPad
Click on Open in "Digital Editions"
If you do not have an Adobe ID, you can create a unique Adobe ID and password by clicking on Create an account at Create Adobe ID
If you forgot your Adobe ID password, go to Reset forgotten password
When you have an Adobe ID set up, enter your Adobe ID details and click on Authorize
Your ebook will download in your Digital Editions Library