Plain Jane and the Mermaid

"The heroine is plain, the villain is beautiful, the love interest(s) are hot, and the bad guys sometimes involve water demons in bad toupees (which is always a good thing). In danger of losing her home upon the death of her parents, Jane proposes a marriage of convenience to the good-looking, yet poor, Peter. But when Peter is kidnapped by an amorous (and hungry) mermaid, it’s up to Jane to save the day. Vera Brosgol flies in the face of all those beautiful Disney heroines with a girl who’s clever and brave but has enough personal flaws to be relatable. An original fairy tale that’ll have comics fans clamoring for more. (For ages 10 to 14)"