The CAA style of questioning and the need to be pedantic with grammar and meaning has always caused a problem for many. The formulae for success has never changed however: RTFQ = TFA.
The recognised publishers such as Pooley and AFE have in the past been briefed with the required knowledge to incorporate in their manuals. An up to date manual is a must. On one occasion the changes were so extensive that both these publishers produced supplements to cover the changes. The AOPA distance learning online course has received very good reviews. I would expect AOPA to be very up to date given their history of a close working relationship with the CAA.