Nightwing: Rebirth Omnibus

"Dick Grayson has taken on many identities. Batman's Robin, a spy, a ghost--now [he] gets back to his roots in the beginning of the DC rebirth era. A new evil has returned to Gotham to threaten everything that Nightwing holds dear to him. While rekindling a former romance with Barbara Gordon--now a superstar crime-fighter in Gotham--Dick will have to embrace his destiny or watch his life be destroyed forever"--