Reddit reviews National Audubon Society Field Guide to the Rocky Mountain States
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Random House Audubon Field Guide: Rocky Mountains by Peter Alden, Jonathan Kahl - 9780679446811
Audobon Society field guides have always served me well. You can get general ones (birds of North America, mammals of North America, plants of North America, etc.), or you can get more specific ones for the region you're in that include plants, animals, geology, etc.
The only issue I could see is that the regional guides usual base their focus on the United States. That being said, the National Audubon Society Field Guide to the Rocky Mountain States (Montana, Wyoming, Idaho, and Colorado) should contain much of the same wildlife as you'd find in Alberta.
The other big name (at least in the United States) is Peterson, though I'm not sure if they have regional guides. I'm most familiar with their larger reference books.