Unsolved - (Invisible) by James Patterson & David Ellis

The Invisible Killer is a gripping thriller that will keep you on the edge of your seat from start to finish.

When two FBI agents are tasked with solving a series of seemingly unrelated deaths, they soon realize that each case is more complex and sinister than they initially appeared.

With a unique skill for seeing connections others miss, agent Emmy Dockery is determined to solve the case, but she's not alone in her pursuit.

A cunning killer is watching her every move, waiting for the perfect moment to strike.

Will Dockery be able to uncover the truth before it's too late? Find out in this heart-pumping, twisty thrill ride of a novel from the world's bestselling author, James Patterson.