Letty Whittaker 04-The Blood We Spill

4. The Blood We Spill (2014)
Still suffering recurring panic attacks following the murder of a close friend just months ago, psychotherapist and recovering alcoholic Letty Whittaker is struggling to bring her life back to normal. She’s getting there. 
But when her best friend disappears into the depths of a religious cult, Letty is forced to cut ties with her safe life and plunge into a world of fanaticism, hypocrisy, and danger.
What Letty discovers is a community in upheaval. The cult's second-in-command has disappeared without a trace. As its members vie for dominance in the power vacuum, the leader's demands for his “children” to reject worldly evils, and commit their lives—and money and properties, of course—to purity and sacrifice grow increasingly bizarre. 
Determined to not give up the hunt for her own strangely elusive friend, Letty digs into the legion of dark secrets hidden within the community, and unearths more than she may have bargained for.