I tried using the Tom Books and found there was far too much detail in them.
Remember don't nother with anything above FL100 as a PPL you aint going that high for a long time.
I was taught this approach and it worked fine. I got 98%.
PS Paper 1 is the easiest I recon!!!! If you take this option don't get hung up on Air to Ground signals etc. Afterall it's all complete rubish any way.
Don't worry too much about all the weitd stuff such as spare parts etc. You don't need to know it.
I'm not telling you what is on the paper but make sure you know what a ditch is. it may result in a very easy mark!
Just learn what is in the Confuser.