CRKN made a lot of additions at canadiana.ca on 8 July. Although I was curious about why a collection of works by Oscar Wilde, originally published around 1910, would be the largest part, and even some by him in translation to German, there are a few additions I found more interesting.
One is The universal encyclopedia : a comprehensive reference book (section C-E), published in 1920 in Toronto, perhaps there was a copy in your ancestor’s home.
There’s also the unpromising-sounding Course in banking: economics from Queen’s University, dating from around 1915.. Still, I dipped in and found information, such as the details below on emigration, that might be helpful context for the world your ancestor inhabited.
Find these at https://www.canadiana.ca/view/oocihm.97384/1. There are also some stats showing the ups and downs of the Canadian economy from 1872 to 1913.