Winter Soldier by Ed Brubaker

Book excerpt: When ex-Russian sleeper agents awaken, the trail leads to Latveria, and Winter Soldier and the Black Widow come face-to-face with Dr. Doom. Can Marvel's superspies prevent war with Latveria? Can Barnes stop the sleepers he himself trained? Old enemies resurface with new identities, and Winter Soldier and Black Widow's hunt gets personal after a savage murder. Now Barnes must save the Widow from her own past. But even with help from Avengers teammates Wolverine, Captain America and Hawkeye, the Winter Soldier must decide whether he is willing to sacrifice everything to save his love.