"Bitterblue" by Kristin Cashore is a young adult fantasy novel and a companion to her earlier books "Graceling" and "Fire". The novel follows the young queen, Bitterblue, as she tries to come to terms with the legacy of her father, a cruel and manipulative king who controlled his kingdom through lies and mind control. Bitterblue seeks to unravel the truth about her father's reign and heal the wounds he inflicted on her people. As she delves deeper into the past, Bitterblue uncovers a web of secrets and betrayals that threaten to tear her kingdom apart. Along the way, she is aided by her friends and allies, including the mysterious thief, Saf, and the Graced fighter, Po. The novel explores themes of power, corruption, healing, and the search for truth and justice.