I just sat this subject and had previously bought the Rob Avery books. They were ok but long and no revision exams at the end of each topic. Especially book 3 just goes on & on & on. I had been given a copy of the AFT notes. Concise and revision exams at the end plus a host of really good prac exams.
I would go the AFT notes, like I said i did it about 3 weeks ago. Handing over.