Under Loch and Key by Lana Ferguson

Keyanna “Key” MacKay is used to secrets. Raised by a single father who never divulged his past, it’s only after his death that she finds herself thrust into the world he’d always refused to speak of. With just a childhood bedtime story about a monster that saved her father’s life and the name of her estranged grandmother to go off of, Key has no idea what she’ll find in Scotland. But repeating her father’s mistakes and being rescued by a gorgeous, angry Scotsman—who thinks she’s an idiot—is definitely the last thing she expects.