The Ultimate Evil — Andrew H. Vachss

Weary of fighting exotic criminals, Batman has reached a crossroads. As wealthy philanthropist Bruce Wayne, traveling with a beautiful young social worker and child advocate, he begins to realize a change must occur in his life. But what? Alfred, his faithful servant, provides the answer. He reveals to Batman the secret of his parents' death. They weren't the victims of random crime, they were murdered with intent. Wayne's mother was also a crime fighter. She discovered a worldwide network of child pornographers, pedophiles, and pimps and left behind her findings with instructions to Alfred to turn them over to her son when the time was right. Batman targets child sex tourism promoted by a Southeast Asian country and, posing as a pedophile, makes the right contacts and soon finds himself battling the government.