Superman Vol. 4: Black Dawn (Rebirth), Paperback

In the wake of the epic -Superman Reborn- storyline, the Kents are faced with leaving their adopted hometown of Hamilton to go back to Metropolis, but someone or something doesn't want them to leaveAnd while the Family of Steel makes their way to the big city, Batman and Robin discover something is mysteriously wrong with the son of Superman--he's losing his powers
Collects SUPERMAN #20-25.