Derek Walter


Derek Walter is an animal activist and cofounder of the Happily Ever Esther Farm Sanctuary in Campbellville, Ontario


The True Adventures of Esther the Wonder Pig

Steve Jenkins, Derek Walter, et al.


Happily Ever Esther: Two Men, a Wonder Pig, and Their...

Steve Jenkins and Derek Walter


Esther the Wonder Pig: Changing the World One Heart at a Time

Derek Walter and Steve Jenkins


Learning MIT App Inventor: A Hands-On Guide to Building Your...

Derek Walter and Mark Sherman