IMO the best thing you can do is read the books front to back, making sure you reread anything you dont feel comfortable with and then go through the ppl confuser front to back. the confuser is a very good reflection of the questions you will encounter through the ppl exams, and it is very well laid out! also use the questions on the back of the books if they are there (you dont mention which books you have). they are good to consolidate things you are unsure of before you go to the confuser.
In short do as many questions as you can get your hands on, but leave the confuser till last as it is the most accurate representation of the caa exams.