Lucie Brock-Broido's new book takes its title from the three mysterious letters left by Emily Dickinson at her death - two addressed to "Dear Master, " the third to someone unknown. Lucie Brock-Broido's verse-letters echo and traverse Dickinson's wilderness of injury and worship; her language is at once blistering and mystical. These are her own brocade devastations - a tapestry of abandonment and bliss.