The Penguin (The Penguin #0)

Following the Penguin’s death in the landmark Batman #125, the mysterious Executor has enlisted Catwoman to carry out the departed’s last wishes and track down his next of kin. But when the Penguin’s heirs start getting murdered, Catwoman will have to find the killer and discover what truly became of Oswald Cobblepot. Collects the Batman #125-127 backup stories by the red-hot creative team of Chip Zdarsky and Belén Ortega!