The Transport Canada Aeronautical Information Manual (AIM) has been around for a long time. It has always been one of the first references for operating pilots in Canada, and as such, is on a continual update cycle.
The most recent revision includes a new section for RPAS pilots. In addition to highlighting relevant sections of the Canadian Aviation Regulations Part IX, there is good technical information relevant to operating an RPA in Canadian Domestic Airspace. Definitely give it a read if you are about to write your advanced exam.