Sentinels of Justice: Another Crisis on Earth-Four
by Libbylawrence 
A mysterious figure armed with power like that which destroyed universes during the Crisis on Infinite Earths begins gathering a horde of villains for a mission of evil and tempting heroes with offers they can’t refuse! Meanwhile, Ted Kord’s father is plotting against his own son in an attempt to force him to bend to his will by hiring an impostor to frame the Blue Beetle for a series of crimes! And a mysterious new hero called Supernova appears on the scene, but who is this masked man, and what is his purpose? Join the Sentinels of Justice as they battle evil on two fronts — on Earth versus a group of new villains called the Pseudo-Squad, and in outer space versus a threat to the universe itself! Introducing the Silver Scarab, and featuring the return of the greatest of all forgotten heroes!
DC Universe: Crisis on Infinite Earths: The Villain War
by Martin Maenza, adapted and expanded from Crisis on Infinite Earths #9-10 by Marv Wolfman and George Pérez 
As the remaining Earths begin to merge together, Brainiac and Lex Luthor of Earth-One have a plan to take them all! With an army of super-villains gathered from all five Earths, they mount a carefully planned invasion of Earth-Four, Earth-S, and Earth-X, swiftly defeating those worlds’ heroes. An army of super-heroes from Earth-One and Earth-Two soon arrive to free the other three Earths, but with the numbers favoring the villains, can the heroes rally to beat the odds? Guest starring the Justice League of America, the Justice Society of America, the New Teen Titans, the Outsiders, Infinity Inc., the Doom Patrol, the Marvel Family, the Freedom Fighters, and the Sentinels of Justice!