Quick Readers were 49 small (3" x 4 1/2") books published by Royce Publishers of Chicago from 1943 through 1945. There were collections of short stories but also a number of novels, including Jane Eyre, Crime and Punishment, Wuthering Heights and The Way of All Flesh. The books were 128 pages long and usually had illustrations. At 128 small pages you can imagine how much A Tale of Two Cities or Gulliver's Travels were abridged! They sold for 10 cents.
The Canadian editions were copyrighted in the Dominion of Canada and published by Royce Publishers (Canada) Limited at 40 Lombard Street in downtown Toronto. All the examples I've seen are identical to the American edition except the price is marked 15 cents on the inside front cover. I know of Canadian editions from the beginning of the series to near the end so it is likely that all 49 were published in Canada.
Here are four examples (doesn't Count Bruga look like the actor Paul Bradley who played Joey in the 1970 Canadian movie Going Down the Road?).
Quick Reader 118
Quick Reader 107
Quick Reader 117
Quick Reader 109