You should add to your list Humans and other animals by Samantha Hurn. This is a forthcoming book from the leader of the MA in anthrozoology from the University of Wales Trinity Saint David, a course whose core module won the HSUS distinguished course award in 2010. The MA at the university of Wales was the first of its kind in the world and can be completed distance learning.For more information check out www.trinitysaintdavid.ac.uk/en/courses/postgraduatecourses/maanthrozoology/