Did mine about 2 months back TOGA Flex, the book is very helpful but from what I can tell CASA have changed quite a bit of the wording for their questions so it is no longer really aligned with what is in the FAA Handbook, basically the same knowledge but now requires a lot more deciphering to figure out what they're after!!
They will also ask you some Part 61 Questions, everyone I know who has done it recently just had 2 relatively simple questions at the start, just take in Part 61 and you'll be fine for those.