The syllabus was relaunched in 2019 and we rejigged the placement of topic areas but didn't add anything new, so if you have all the old textbooks you should be covered. Remember though that we used to have Incorporated Businesses at Level 4 Certificate and now that has been moved down into Level 3. If you don't have the old Level 4 book (just 2 and 3), I would recommend you purchase this textbook which bridges the gap:
I would also add that the new textbooks are really thorough and very popular, and you can get a discount if you purchase the whole series.
Please don't hesitate to give us a call if you want to talk it through with us.