I do Canadian history as it corresponds to world history. When we are studying the earlier explorers of North America, we read about explorers who explored Canada etc… We read some First Nations legends with our younger kids, too.
Canadian history is notoriously hard to find living books for. Some resources we’ve used ( will * the ones that are suitable for children your son’s age):
*Isabel Barclay O Canada (out of print) used as a spine
*Donalda Dickie My First History of Canada
out of print novels from The Great Stories of Canada series: “Man From St Malo: The Story of Jacques Cartier” and “The Story of Champlain: The First Canadian”
Maxine Trottier A Circle of Silver Chronicles trilogy
Ethel C. Brill Madeleine Takes Command – historical novel
LM Montgomery Rilla of Ingleside (really valuable book literature/history combo)but it is the only home front WW1 book written by a woman living during WW1.
Sharon McKay Charlie Wilcox (WWI Canadian perspective)
Loyie Larry Goodbye Buffalo Bay (residential schools)
Canada DOES have many beautiful historical picture books. Two of my favourite are:
*Jean E Pendziwol picture books, The Red Sash and Once Upon A Northern Night