The Flash v04 - Reverse (2015)

The fourth volume of Brian Buccellato and Francis Manapul's New 52 breakout hit - The Flash!
A mysterious and powerful Speed-Force killer has left a trail of bodies in his wake and only Barry has the power to stop him. But when the killer stays one step ahead of him, Barry finds himself face to face with the Teen Titans and Kid Flash for the first time. All this will lead to a confrontation with the Flash's most deadly foe, The Reverse Flash!
Collects THE FLASH (2011-2016) #20-25, and #23.3: REVERSE FLASH.