Katheryn Sanders sees what others miss. It's why she's so good. It's also why she's alone. A dead analyst. A predator silenced. A librarian poisoned among his own stacks. The victims have little in common. Sanders is the first to realize that's exactly what makes the pattern so easy to miss. At the same time, a masked crew calling themselves the ZooKeepers is tearing through Chicago's drug trade, attacking dealers and leaving destruction behind. Their methods are brutal. Their targets make it easy for some people to look the other way. As the two investigations deepen, every answer leads to another question and every step forward puts Sanders at greater odds with the people trying to keep her contained. With a new captain tightening the reins and the truth slipping further out of reach, Sanders must decide how far she is willing to go to catch those responsible-and what she is willing to risk when doing the job right means refusing to stay inside the lines. Some killers want control. Others want order. The Librarian's Hit List is Book Two of The Catalyst Series, a dark Chicago crime thriller from S.W. Strackbein.