Her Baseborn Scot. The Highland Warrior Chronicles, #3

A warrior with cursed royal blood... Tough Scots warrior Finn Braeson dreams of finding a gentle lass to love and share his life with. But when he is commanded by his king to marry the princess of Pictland he has no choice. It's the only way to protect his mother and younger stepsisters from the king's wrath. But before he can wed the elusive princess, he must first go undercover and find her. A princess who must hide her identity... Bound by a deathbed promise to her husband to never reveal her true identity as the princess of Pictland, Mairi is a fugitive in her own land.
Following her beloved goddess and the omen of the Blood Moon, she's determined to avenge her people against the upstart king, and has no intention of falling for the silken charm of any Scots warrior. Yet despite the danger of discovery, and the secrets she must keep, she cannot resist his allure. First love, only love... Captivated by the wit of the beautiful Pictish lady who has ensnared his heart, Finn craves for a future with her.
But when betrayal rocks their fragile alliance, they must fight the political intrigues that surround them and put their trust in each other - or risk being torn apart forever. "A sizzling romance, kingdoms at war, true heroes coming into his and her own, this book has it all!" Deeanne, BookBub "If you love historical times and places, Ms. Phillips takes you on an incredible journey!" Liza, Goodreads