Ocean Shifters series by Daisy Harris, (books 1-3)

1. Mere Temptation: After twenty years in Landworld, mermaid Ismaelda Freya seeks refuge in her home habitat, Key Sirena. In all that time, she's never taken a human lover to become fully human, but neither is she willing to give up her freedom and be marked forever as mere.

The sea dragon Sidon can have anyone and anything he wants, except the one female who left. Using every trick he's learned in her absence, he vows to convince her to stay.

Not even a shape-shifting mermaid can keep her options open forever. When faced with losing everything she values, Isa must choose between her freedom and her one true love.

2. Mere Passion: "Alara ..." His heavy breaths made speech difficult. "You can't ... I might ..."

She broke into a smile that could topple empires and bring monsters to their knees. "Of course you will."

Straight-laced dragon General Kai Nasu dreams of reviving his Empire's glory. Step one: conquer the Arctic mere habitat. But subduing the dolphin-shifting barbarians proves difficult when his human-form body starts breaking all the rules.

Commander of the Island's Armed Forces, Princess Alara Skjelfjord plans to kick the haughty reptile's butt back to where he came from. But the dragon emissary is hotter than a lava tube, and much as she wants to get rid of him, she wants to ride him first.

Alara inflames Kai's body but denies him her heart. It's only when Kai questions the very beliefs that made him that he can earn her love and become the dragon he was destined to be.

3. Shark Bait: Raider had spent years honing his front, but as Sophia calmly assessed his erection it occurred to him--no male holds the upper hand when his pants are around his knees.

After seventeen mating refusals, sea dragoness Sophia Aleahar is getting more than a little desperate. But when she swims to a potential mate to convince him to reconsider, she‘;s taken hostage by shark-shifter pirates.

Mere-shark hybrid Raider ShaCrayz has spent ten years in the hold of his father’s ship. The tiny dragoness prisoner inspires his most vicious and most gentle impulses. When she offers him freedom in exchange for helping her lure a mate, Raider decides he wants to be more than just a beast on a chain.

Raider desires her like no male ever has, but Sophia needs to learn that no handsome dragon is worth more than the bad-boy shark who loves her.