Throne of Change by J. A. Armitage

What happened after the happily ever after?
You all know the story of your the Little Mermaid, but did you ever wonder what happened after the fairytale ending? Well we know. Not all afters end up happily, sometimes the real adventure starts much later…
I know I shouldn’t have read my mother’s diaries, but I wasn’t prepared for the huge revelation about my history. It seems I’m not the only one interested in my past. Kidnapped by the Sea Witch, I need to find the connection between her and my mother or risk being stuck here forever…or worse.
Can Fish save me or am I destined to be a slave to the witch forever?