To the author: I commend you on your work! As a former full-time educator, I believe that one of the best thing you can do to promote usage is to create supplementary materials (lecture slides, quiz deck in Blackboard format, etc.
I do realize there are differences between everyone, but when I was an educator, there were many times when I was expected to teach multiple subjects that I had little to no experience with, with as little as one days notice in many cases (the adjunct had a baby. Can you teach this?).
TLDR; Having a good text is a good start. To increase adoption and usage, create teaching materials, which saves valuable time for instructors.
Peace out
