The Americans produced their well-known Armed Services Editions and English publishers their less well-known Services Editions. Canada did not have a similar effort. But there are a few examples of Canadian paperback publishers helping out with getting books to the armed services.
Beaver Publications of Hamilton, Ontario published three books in 1941. They were the first mass market paperbacks published in Canada. All had illustrated covers that were sold on newsstands as well as armed services editions that were packaged as a gift box for families and friends to send to soldiers, sailors and airmen. The covers were coloured for the three services - Canadian Army (tan/yellow), Royal Canadian Navy (blue) and Royal Canadian Air Force (red). I have also seen a blue box.
Beaver Armed Services Gift Box