Faerest - Coventry Chronicles, #1

Where rivers cross, danger beckons... Mystery has surrounded Sydney White for as long as she can remember. Her mother's death puzzled even the hardiest of investigators, but eventually, they just stopped trying. So, when Syd is presented with the opportunity to finish a degree in faery anthropology that her mother began over twenty years ago, she leaps at the chance to learn the truth. However, truth is often stranger than fiction, especially when the lines between faery and human are eroding each day.
Syd will have to navigate unthinkable deals, a prince in peril she swore she would never speak to again, and an organization only known as Coventry.