Tir Alainn trilogy

The first novel in New York Times bestselling author Anne Bishop's Tir Alainn Trilogy.
The youngest in a long line of witches, Ari senses that things are changing—changing for the worse. For generations, her kin have tended the Old Places, keeping the land safe and fertile. But with the Summer Moon, the mood of her neighbors has soured. And Ari is no longer safe.
 
The Fae have long ignored what occurs in the mortal...

The Fae and the humans are forming an alliance to stop the Master Inquisitor, who is determined to rid the world of female power and destroy any opposition, which forces them to seek help from the witches of the House of Gaian.