I don't know if it is of any help, but I had a set of Trevor Thom's books. By and large,there appeared to be a lot of duplication between them, me , being old and cynical, assumes it was deliberate "padding" to make you buy 6 books instead of 4.
but they wouldn't exploit a poor trainee, would they?
whizz-wheels are extortionately priced, considering the tooling-costs to make/emboss them,must have been recouped about 50 years ago!
Tiny volumes, I hear them cry.......If that's the case, why aren't they all selling the same one from a single manufacturer?
couldn't possibly be that the margin is so fat that they can all afford to develop their own. (or plagiarise the basic scales which remain the same and play with the cosmetics)
Sorry, back on track,- the Thoms I found easy-reading and the repetition did help to refresh the memory. Basic physics really don't alter,so most of the" old " info in your volumes, is still valid.....there are possibly changes in Air Law and new research affecting Human Performance.
it's highly unlikely these changes have filtered through to the exam papers
Even more unlikely,is the possibility thesepotential "fails" would form a significant proportion of the wrong answers you are allowed,whilst still getting a pass.