Tera Lynn Childs brings a delightful mix of wit, romance, and fantasy to her books. Fins, her YA mermaid series, is a great pick for fans of Meg Cabot's humorous love stories. In Just for Fins, third in the series, half-human, half-mermaid Lily Sanderson has decided to remain Crown Princess Waterlily of the mermaid kingdom Thalassinia. She's made a promise to help to help Prince Tellin. Climate change and human pollution are causing suffering in his kingdom, and Lily and Tellin have to convince all the mermaid royals to work together to save the oceans. Lily is distracted by the situation with Quince, the boy she loves. He must pass three tests to prove his love for her or they will be parted forever.

Unrequited love is hard enough when you're a normal teenage girl, but for Lily Sanderson, there's no such thing as a simple crush.

Lily has a secret, and it's not her huge crush on gorgeous swimming god Brody Bennett, who makes her heart beat flipper-fast. Lily's mermaid identity is a secret that can't get out, since she's not just any mermaid--she's a Thalassinian princess. When she discovered three years ago that her mother was actually a human, Lily finally realized why she didn't feel quite at home in Thalassinia, and she's been going to Seaview High ever since. Living on land has its problems--like her obnoxious biker-boy neighbor, Quince Fletcher--but it has that one major perk: Brody. The problem is, mermaids aren't really the casual dating type--when they bond, it's for life.

When Lily's attempt to win Brody's love leads to a tsunami-sized case of mistaken identity, she finds out, quick as a tailfin flick, that happily ever after never sails quite as smoothly as you planned.

On Lily Sanderson's eighteenth birthday she'll become just a girl--still a mergirl, true, but signing the renunciation will ink Princess Waterlily of Thalassinia out of existence. That leaves plain-old Lily living on land, dating the boy she loves, and trying to master this being-human thing once and for all.

Now that Lily and Quince are together, mer bond or not, she's almost content to give up her place in the royal succession of Thalassinia. But just when she thinks she has everything figured out, the waves start to get rough. Lily's father sends a certain whirlpool-stirring cousin, Doe, to stay with her on land. And why why why is she batting her eyelashes at Lily's former crush, Brody?

The seafoam on the raging surf comes when a merboy from Lily's past shows up--Tellin asks Lily for something that clouds her view of the horizon. There's a future with Quince on land, her loyalty to the kingdom in the sea, and Lily tossing on the waves in the middle. Will she find a way to reconcile her love, her duty, and her own dreams?