Need some advice on study plan?plz help

I am going to give p2 this December , but as of now I don’t have latest study text (I will be getting it after 1 week) and I have the text for upto June 2015.So if I don’t want to waste my time can I start studying from that book.Does part A of syllabus I.e. conceptual framework so is it important to first study and then move on to later parts or can I directly start from practical parts as I prefer theory part to be done at last ( if there is anything important in part A plz let me know so I can move onto part B after having a look at it)