Uncanny X-Force: The Dark Angel Saga Book 1 by Rick Remender, Jerome Opena, Billy Tan, Mark Brooks
Apocalypse's heir, Archangel, has picked up where his predecessor left off, amassing an army of En Sabah Nur's greatest servants! The only hope X-Force have of saving Warren Worthington from the dark entity that inhabits his soul rests in a dimension where Apocalypse, and his technology, took over the world: the Age of Apocalypse! However, before X-Force can obtain the thing capable of saving their friend, they must defeat the Amazing X-Men! Plus: Magneto uncovers X-Force's existence, and the only way he'll keep their secret is if they assassinate a mysterious figure from his past! Why can't Magneto do the deed himself? The answer is buried in a terrible secret from the ashes of World War II. Collecting UNCANNY X-FORCE #8-13.
Rick Remender is the writer/creator of comics such as Fear Agent, The End League, Strange Girl, Black Heart Billy, Last Days of American Crime, Sea of Red, Sorrow, Night Mary, XXXombies and Doll and Creature. He is also the writer of Marvel's X-Force, Punisher and Doctor Voodoo. Outside of comics he has served as a writer on the Electronic Arts hit game Dead Space and is currently lead writer on EA/EPIC/PCF's Bulletstorm game. Prior to this, Remender served as an animator on films such as The Iron Giant, Anastasia, Titan A.E., and Rocky and Bullwinkle.