Batman & Scooby Doo Mysteries #2

"Scooby-Doo and Batman team up to solve the mystery of a ghost who’s haunting the Batcave! Even if the ghost turns out to be a fake, that still doesn’t answer the real question: How did someone get into the Batcave to stage the phony phantom—and does it mean Batman’s foes have cracked the secret of his true identity?!"