The exams are a bit of a pain but it is just a case of accepting they will take a bit of time to get through them. I used the Trevor Thoms books but after giving up flying for a few years and wanting to refresh myself I bought the Oxford CD roms and they are pretty good although a bit expensive. They do make it easier though than reading the books.
I have a set for sale second hand if you decide to go this route. Just personal message me!