Hi there As a fellow Canuck I can tell you from experience that it is cheaper to by on line. I got the 3 hr from Amazon,ca for 17.95 & the 8 min in the morning from ALIBRIS for 2.99
Mine was $14.00 at BJ's a buying club. You can start by drinking at least 64 oz. of water each day and eating every 3 hrs. The timing was the hardest for me. Hope this helps you get a head start.
Also there are sticky posts at the top with most of the info for this diet. Read those as well while you are waiting. My book was a birthday present from a fellow LLR. I know she got it online and it was about 20 or less.