The University of Calgary Libraries and Cultural Resources website holds is an amazing collection from across Canada which I imagine is growing constantly.  Right now their collection from Saskatchewan contains 360+ books!! 

The University previously had a website for digitized local history collections called ourroots.ca but they pulled that in to be part of their greater library research site in 2018.

https://digitalcollections.ucalgary.ca/

Jump to their search page and enter your ancestor names and places and see what you find.

Find more eCollections I have used in my article Family History eCollections.