Tears & Cruor (Blood, Bloom, & Water, Book Four) by Amy McNulty
An insurgent mermaid champion. The vampire champion who just wants to see this war end. The battle between blood, bloom, and water is about to come to a head.
Ember Goodwin knows it looks bad that she’s now the champion of water, but she firmly believes that the ends justify the means. Though smitten with her merman prince, she’s not certain they can keep their plans to save those she’s wronged secret from the friends and foes alike who would stand in their way.
Ivy Sheppard never saw herself crossing sides to become the champion of blood, but it’s the only way to protect her little sister from their traitorous step-sister. What she doesn’t expect is to fall in love with an undead prince whose days might be numbered.
The fourth book in the Blood, Bloom, & Water series sees friend become enemy and adversary become lover in the climax of the battle between vampires, mermaids, and faeries. After the events that unfold, things will never be the same.