ISOLAND4: The Anchor of Memory

Which part of the Isoland series does 'ISOLAND4: The Anchor of Memory' belong to? Is it a continuation of the story from 'ISOLAND 3: Dust of thIsoland is it a new chapter? Can it really explain the past and present of the Isoland? You won’t know until you’ve played it yourself. Wait, even after playing it, you may still not know for sure. :) Since the beginning of the journey in Isolandd, things have been constantly changing, both in and out of the game.