Sinopsis

When the FBI is faced with its toughest riddles, it turns to Agent Elle Keen, a genius at cracking codes and using her skill to catch the most cunning serial killers.
When a new serial killer leaves behind a haunting music box after claiming each victim, FBI Agent Elle Keen must rely on her sharp instincts and sharper mind to decipher the cryptic melodies—before the next life is taken.
"The plot has many twists and turns, but it is the ending, which I did not see coming at all, that totally defines this book as one of the most riveting that I have read in years."..M.F