Batman: The Ultimate Evil write about Thailand, he created a fictional country named Udon Khai which had many similarities with Thailand — though Udon Khai is described as being dominated by a lone kingpin who controls the country's one-industry economy based on sex tourism while Thailand's tourism economy, which includes sex tourism, is part of an economic development strategy enabled by international development agencies. Vachss deviated from Batman canon by having the Wayne family butler, Alfred Pennyworth, reveal to Bruce Wayne that his mother, Martha, was a sociologist who was secretly investigating a child pornography ring. In Vachss' novel, the Waynes were not the
Batman: Mask of the Phantasm her, but just before he can kill Andrea, Batman arrives and begs Andrea to give up her quest. She refuses and disappears. Batman and the Joker battle to a stalemate. Moments later Andrea returns and seizes Joker, bidding Batman goodbye before vanishing with the maniacally laughing clown. The amusement park erupts in a series of explosions and Batman barely escapes. Alfred later consoles Bruce, telling him that no one could have helped Andrea. Bruce finds her locket, containing a picture of himself and Andrea, in the Batcave. Meanwhile, Andrea departs from Gotham alone on an ocean liner, feeling completely lost.