I have totally just found the title for your next book. Check it out!
Just think: this could herald a whole new dawn of fucked-up shit going down on Kirrin Island. Prospective future titles might include Five Bag an ASBO, Five Get Addicted to Crack and Five Become Four When Depraved Sex Game Goes Tragically Awry. I imagine Aunt Fanny would give them a right hiding.
Hope this helps.