Harper, who worked on the book in 15-minute bursts most evenings and is an avid hockey fan, said he had enjoyed conducting the research on hockey, which is Canada's most popular sport.
"The early days of professional hockey featured outsized personalities who fought pitched battles to shape the game we know and love today," he said in a statement from the publisher.
"Writing this book has taught me a lot about hockey and a great deal more about Canada. I hope all who read the book enjoy it as much as I enjoyed the experience of writing it."
According to media reports, Harper is not using a ghost writer and has been studiously researching his subject. He is a member of the Society for International Hockey Research.
While Harper has had tried not to show favoritism for any one team, he has admitted his first love is the Toronto Maple Leafs, which last won the Stanley Cup in 1967.
Harper's royalties will go to the Military Families Fund, which provides emergency help for military families.