New Teen Titans TPB Volume 11

"As these stories from the late 1980s begin, the Titans battle the Omega Men in the depths of space! Then, while the evil Blackfire takes over as ruler of the planet Tamaran, the team returns to Earth to take on new missions. Together, Cyborg and Changeling try to track down Changeling's father, Mento, while Wonder Girl leads a new team of heroes into Switzerland to stop Cheshire from disrupting a summit talk between the U.S. and Russia-and Nightwing sneaks into Brother Blood's headquarters to free Raven. Collects New Teen Titans #16-23 and The Omega Men #34."