Corsair’s Curse by Shari L. Tapscott

Dragon slaying isn’t for the faint of heart, but it suits Soleil Eldemyer just fine. Sure, the pay isn’t great, and the hazards are plentiful, but overall, things are going well for the mage…until Davyn and Lukas Greybrow walk back into her life.

Soleil never expected to meet the infuriating brothers again, and certainly not while she was tied to a sacrificial pyre. Not only do they sabotage the job with their strange dragon-whispering twin gift, but they deliver unsettling news: Soleil’s friend is in trouble.
Now they’re working together as part of a larger team aboard the Greybrow’s ship, tasked with finding a legendary pirate’s treasure that’s the key to saving the group of historians that were arrested for excavating in forbidden territory. And Soleil isn’t the only one disconcerted by the new arrangement.
It’s been four years since Davyn and Lukas have seen “little Sunny,” and she’s not so little anymore. The rough-and-tumble, wild-haired friend from their youth is gone, and in her place is a capable slayer with a sharp tongue and a captivating smile.
The brothers vow they’ll never let a woman come between them, especially when that woman is Soleil—but that’s something that’s easier said than done. Thankfully, a bickering crew, a vengeful pirate, and an infamous sea monster are all more than willing to distract them from their rivalry.

They’re heading into perilous waters, but with the Greybrow brothers at the helm, what could possibly go wrong?