In my opinion, there is NO NEED to purchase any material or study help. (unless perhaps you struggle with either English/French) All the information is available in the Discover Canada book and there are a multitude of FREE online tests simulations and questions (google is your friend) that, I feel, adequately prepare you for the test itself.Thanks! That's very good score... CONGRATS!
Did you use the free simulation tests on this portal or bought full access for $29?
I read the book a few times. Did the questions in the book and worked thru the free online tests a number of times. I scored 20/20 and was done the test in under 5 minutes.
Just my opinion.... and although it seems daunting at first (I only started reviewing the week before the test and was initially worried!) the more you go through the material, the more it becomes more familiar and manageable.
Good Luck!