Calibre imagery use request

I'm going to be doing an informational presentation in my master's of software management class and I would like to have permission to use the imagery found throughout the Calibre website.

(I couldn't find a better way to contact the site owners)

My presentation is part of a assignment and is non-profit, to a class of about 30 students and would not be recorded in any way. Topics covered would be benefits, features, limitations and future developments.

If you had a repository of images that I could use that would be very helpful.

Thanks,
John