Hey M-D,
The current Des O'Neil course is the 'Sapphire Package' and includes 3 books:
-Practising Humanities MCQ (Red Series)
-Practising Science MCQs (Green Series)
-Writing Better Essays (Purple Series)
The practising Humanities MCQ and the practising science MCQs are exactly the same as the ones you have now. The only book you are missing from the 'sapphire package' is the writing better essays book.
Apart from these books, Des offers one more book, the science revision book.
The latest one is the red one (takes into account the no calculator rule), but I've heard from many people that it doesn't differ that much from previous versions (blue, yellow). The older versions are also significantly cheaper.
Hope I've clarified this for you.
Good luck with your GAMSAT prep !