2018 study text is ok – the only change is a more detailed look at money laundering
But, in all honesty, you don’t need a study text
The free lectures, the course notes and an up-to-date revision kit should be sufficient (provided you put in the effort too) – but you MUST get the up-to-date revision kit
And, of course, if you need assistance in your studies, don’t hesitate to post on this forum and I shall get back to you