The Flash by Francis Manapul and Brian Buccellato Omnibus

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!
Francis Manapul and Brian Buccellato's unforgettable era of the Flash is finally collected into one Deluxe size omnibus!

Collecting: The Flash 1-25