e-Books are available in CannonCat but there is a larger selection through Search Almost Everything. Use the source type limiter on the left column of your results list to limit your result to just e-Books.
JCC also has a really good selection of reference books in e-book format. Try using Credo or Gale Virtual Reference Library from this web page.
Illuminator on Aix by John Adastra
Eaton, L., Maguire, M., and Carlson, L. (2014). Extraterrestrial. In The ashgate encyclopedia of literary and cinematic monsters. Surrey, United Kingdom: Ashgate Publishing. Retrieved from http://search.credoreference.com/content/entry/ashgtmonster/extraterrestrial/0