Battlefield — J.S. Frankel

Martin Calder and his girlfriend, Dana -- no last name given -- are back. Possessing superpowers, Martin joins up with Dana to fight crime throughout their adopted city of Baltimore. Fighting crime on Earth is easy, but when an old enemy from Dana's world, Ardana, returns to wreak havoc and seek vengeance, it will take more than anyone can possibly give to defeat him. Sometimes, though, giving everything isn't enough.