The Blue Crane Combo Pack for the Canon 40D Digital SLR Camera is a thorough overview of the camera.
In both print and video, this package not only gives you something to watch at home, but an InBrief Quick Field Reference Guide that you can take in the field.
On a job? Forget which button to press? Need to change a setting? The Reference Guide will have the answer for you in a flash. It's faster and easier than carrying the manufacturer's instruction manual.