Options would be two boxes, one for E-Books and one for Physical Books, or merged together. Use your discretion.
[SUGGESTION:
AND
Your best option is to request that the RLML Content Mgt. Department add your books to their Asset list. After they do, you can re-use that Asset. This will ensure that the book assets get updated automatically by the Content Mgt. Dept. as the new editions become available. You can always edit the description of the re-used asset.]
The library subscribes to several e-book packages where you can search multiple textbooks at once. Here are a few of those e-book packages.