Black Widow & Captain America by Waid & Samnee Omnibus

Natasha Romanoff, the Black Widow, stars in a knockdown, drag-out tale of action and espionage! The world's greatest superspy has a lifetime of secrets -- and when some of the darkest ones are made public, nobody is safe. As S.H.I.E.L.D. turns on its once greatest asset, the Widow seeks out her own answers. But will Natasha's hunt for the Weeping Lion send her back to the one place she never wanted to go? Then Steve Rogers is back in shield-slinging action as Captain America, on a journey across the nation he loves to restore his tarnished reputation. But the dangers he encounters require more courage than ever! When he faces the all-new Swordsman, strap yourselves in for a sword-vs.-shield duel unlike anything you've ever seen! And in the far future, Cap faces his worst nightmare as a man out of time once again!

COLLECTING: Black Widow (2016) #1-12, Captain America (2017) #695-704