Vowed (Book #7 in the Vampire Journals)
by Morgan Rice
Caitlin and Caleb land in Scotland in 1350, a time of knights and armor, and they celebrate the wedding of a lifetime. Sam and Polly fall deeply in love, too. But Blake has appeared and so has Sera, and Scarlet, too, finds herself in danger, as we learn who her true parents. Kyle has landed, too, and as they fall into his elaborate trap, Caitlin and the others are on a race to find the final key.