Superman: Infinite City

Superman: Infinite City by Kennedy, Mike. hardcover edition. ISBN: 9781401200671.

When a villain uses a very powerful weapon in Metropolis, Clark and Lois trace him back to an old town called INFINITE CITY. They find the town abandoned, except for a doorway that leads to another amazing world... the true INFINITE CITY, where magic and science happily coexist. Superman and Lois step through the magic portal and become embroiled in a war for power on the other side. One faction wants to stay in its dimension, and another wants to branch out to our world. Superman will meet a doppelganger called the Warden, who shares the Kryptonians might but not his intellect. He will also come across the architect of this world, a robot leader who claims to be what remains of his father Jor-El.