Go to bookstore.chemeketa.edu. If you have never purchased from the bookstore online, then click on Register in the upper corner, and create an account. Then, exit.
In the top right corner, click on login link. Use the login you just created.
Log in, using your email address and bookstore password (same as when you ordered your ebook).
The screen will say, Welcome (your name). Below that will be 5 links. The 4th one down is "activate and access ebooks." Click on that.
You will need to enter the ebook code off the card, and the receipt code off the receipt for each ebook purchased.
You should see a little picture of the ebook you purchased.
If you hover your mouse over the picture, there will be a link to click to download it
If you click on the link, that will take you to the CourseSmart website, where the ebooks live. Register as a new user (if you are) or login (if you are already a CourseSmart user). You should be able to go OK from there.
If you get stuck anywhere along the way there is great telephone support from the ebook people at 888-886-0801.