Collects twenty stories chronicling the adventures of such heroes as Iron Man, Captain America, Black Widow, and Hulk as they fight against supervillains, including Ultron, Thanos, and the Masters of Evil.

Hulk smash! /adapted by Clarissa Wong ; illustrated by Ron Lim and Rachelle Rosenberg -- Black Widow bites back / adapted by Elizabeth Schaefer ; illustrated by Neil Edwards and Rachelle Rosenberg -- Friend or foe? / adapted by Alison Lowenstein ; illustrated by Khoi Pham and Paul Mounts -- Falcon earns his wings / written by Scott Peterson ; illustrated by Andrea Di Vito and Rachelle Rosenberg -- Party crashers / written by Michael Siglain ; illustrated by Neil Edwards and Rachelle Rosenberg -- Battle for earth! / written by Patrick Olliffe ; illustrated by Khoi Pham and Paul Mounts -- Arctic attack! / written by Frank Bumbalo ; Khoi Pham and Paul Mounts -- Kang - Conquerer of S.H.I.E.L.D.! / written by Bryan Q. Miller ; illustrated by Neil Edwards and Rachelle Rosenberg -- Call for backup / written by Chris "Doc" Wyatt ; illustrated by Khoi Pham and Paul Mounts -- Hail, Hydra! / written by Alison Lowenstein ; illustrated by Wellinton Alvez and Paul Mounts -- Attack of Count Nefaria / written by Alison Lowenstein ; illustrated by Andrea Di Vito and Paul Mounts -- Play ball! / written by Scott Peterson ; illustrated by Agustin Padilla and Rachelle Rosenberg -- Thor versus the Avengers / written by Rebecca Schmidt ; illustrated by Wellinton Alvez and Rachelle Rosenberg -- Double take / written by Ivan Cohen ; illustrated by Andrea Di Vito and Rachelle Rosenberg -- Jurassic Central Park / written by Tomas Palacios ; illustrated by Agustin Padilla and Rachelle Rosenberg -- The Avengers' day off / written by Alison Lowenstein ; illustrated by Neil Edwards and Rachelle Rosenberg -- Undercover agents / written by Colin Hosten ; illustrated by Andrea Di Vito and Rachelle Rosenberg -- What goes up must come down / written by Ivan Cohen ; illustrated by Agustin Padilla and Rachelle Rosenberg -- An unexpected hero / written by Chris "Doc" Wyatt ; illustrated by Neil Edwards and Rachelle Rosenberg.