A Single Eye by Susan Dunlap.
It's been a long time since Dunlap has published a book. I think the last one was No Immunity in 1998. I've always liked her writing, and her female protagonists are all strong, smart women.
Darcy Lott, the main character of A Single Eye is no exception. She's a professional stuntwoman based in New York. One big problem for someone in her profession: she's afraid of the woods. Deciding to face her fear, Darcy heads up to a Buddhist monastery in Northern California.
However, the way to enlightenment is filled with roadblocks in the guise of the other people at the retreat. There is a lot of history between some of them, including betrayal and murder....