R. MacGregor Dawson & W.F. Dawson 
Democratic Government in Canada, 5th Ed [PDF ebook] 

For more than a generation this concise survey has been the classic introduction to the fundamental ideas and structure of Canadian government and the practice of democracy in this country. It examines the various elements of federal government — the House of Commons, the cabinet, the Senate, the monarchy and governor-general, the public service, and the courts — and of provincial and municipal governments, and explores their interrelationships.In this new edition Norman Ward has incorporated the many changes in government since his last revision in 1971.