The Reluctant Queen (The Queens of Renthia #2) by Sarah Beth Durst

After Queen Daleina discovers that she needs an heir more quickly than she thought, she sends her champions out to find powerful young women who could take on that role. Naelin is not young, nor does she think she is powerful, but after Champion Ven sees the depth of her strength, he believes she is the heir Renthia needs, even if she wants no part of her powers.

The Queen of Blood (The Queens of Renthia #1) by Sarah Beth Durst

Spirits have always wanted to kill humans living in the forest, but there has always been a queen to keep them in check, until they start attacking remote villages. Daleina, who has an ability to control spirits and was able to save her family from one such attack, makes it her mission to help in any way she can.